Reckless moment car fanatics block Bay Bridge to spin donuts and race in front of revved-up crowd as woman, 20, is injured at one of at least seven weekend sideshows in Oakland

This is the shocking moment young motorists perform donuts and shoot fireworks off a popular bridge in Oakland.

The video was filmed from the middle of the Bay Bridge around 3:15am PT, with hundreds of spectators seen looking on. One was seen waving the Palestinian flag as smoke from the burnouts billowed through the air.

The bridge was blocked for nearly 20 minutes, bringing traffic to a halt.

The event was part of a string of 'sideshows' that sprouted across the Bay Area starting around 11 pm, in Menlo Park, Stanford, Mountain View

Cops confirmed that a 20-year-old woman from Pittsburg, California, suffered a broken ankle after being struck by a car in one of the takeovers, which may be the work of one single group. Officers in several cities are probing the incidents.

Footage shows motorists doing donuts and shooting fireworks off a popular bridge in Oakland. The video was filmed from the middle of the Bay Bridge around 3:15am PT, with hundreds of spectators seen looking on

The event was part of a string of 'sideshows' that sprouted across the Bay Area starting around 11 pm, including this one in nearby Mountain View that saw a female spectator break her ankle after being struck by a spinning car. Cops are investigating the incident

Video from the bridge, meanwhile, shows hundreds of people gathered as the cars spins in circles, coming dangerously close to spectators.

In those clips, no one appeared to be hit - though at points, participating cars looked to come close.

In one snippet, a young motorist appears to have his car stolen by some other revelers after he hit reportedly one of their vehicles doing the dangerous stunts.

The video shows how him apologizing to a fellow spectator, who proceeds to pull a mask over his face and force him out of the car to begin doing donuts himself.

No reports of an automotive theft were immediately aired.

Word of the woman being injured by a wayward car were confirmed by the police force in neighboring Mountain View, some 30 miles south.

There, the 20-year-old from Pittsburg sustained a broken ankle after being struck, cops said - pegging the person as part of a group gathered at Middlefield Road and Bernardo Avenue.

The group, footage from the site shows, appeared to be just as giant as the one on the bridge, but convened about four hours earlier, around 11:30pm.

Video from the bridge, meanwhile, shows hundreds of people gathered as the cars spins in circles, coming dangerously close to spectators

In those clips, no one appeared to be hit - though at points, participating cars looked to come close

One person was seen waving the Palestinian flag as smoke from the burnouts billowed through the air

The bridge was blocked for nearly 20 minutes, bringing traffic to a halt as fireworks went off

In one snippet, a young motorist (not pictured) appeared to have his car stolen by some other revelers after he hit reportedly one of their vehicles doing the dangerous stunts

As if writing, no reports of an automotive theft were immediately aired

Video shows spectators there leaping out of the way of cars spinning at high rates speed, as smoke from fireworks and the burnouts created further chaos.

The woman who was hit was not seen on video, but clips continue to circulate of the takeover, which was the third of at least seven so-called sideshows - a term being used by cops to categorize the increasingly common occurrences.

The first surfaced around 11pm in Menlo Park, a community just north of Mountain View. There, dozens - if not hundreds - of spectators were reported, seen watching the vehicles as they did donuts close by.

The intersection, as was the case with the bridge, remained clogged for nearly 20 minutes, cops said. 

Next came the Stanford area, where a sideshow roughly 15 minutes later closed off another crossway for another 15 minutes - this time at the corner of Coyote Hill and Page Mill roads.

The previously mentioned one at Mountain View was next. Video from that procession - where cops confirmed the woman suffered a broken ankle - is currently going viral.

Word of the woman being injured by a wayward car were confirmed by the police force in neighboring Mountain View, some 30 miles south

There, the 20-year-old from Pittsburg sustained a broken ankle after being struck, cops said - pegging the person as part of a group gathered at Middlefield Road and Bernardo Avenue (pictured)

The group, footage from the site shows, appeared to be just as giant as the one on the bridge, but convened about four hours earlier, around 11:30pm

Video shows spectators there leaping out of the way of cars spinning at high rates speed, as smoke from fireworks and the burnouts created further chaos

The woman who was hit was not seen on video, but clips continue to circulate of the takeover, which was the third of at least seven so-called sideshows - a term being used by cops to categorize the increasingly common occurrences

The first surfaced around 11pm in Menlo Park (not pictured), a community just north of Mountain View, which is seen here

here, dozens - if not hundreds - of spectators were reported, seen watching the vehicles as they did donuts close by. The intersection, as was the case with the bridge and the one in Mountain View (pictured(, remained clogged for nearly 20 minutes, cops said

Next came the Stanford area, where a sideshow roughly 15 minutes later closed off another crossway for another 15 minutes - this time at the corner of Coyote Hill and Page Mill roads

The previously mentioned one at Mountain View was next. Video from that procession - where cops confirmed the woman suffered a broken ankle - is now going viral

Then, more than two hours later, another two sideshows surfaced a few miles up the coast in Oakland, where officials recently passed an ordinance to toughen legal steps it can take against those involved in the street-stopping events.

The first happened on 42nd and International Boulevard around 2 am, featuring tons of fireworks and more donuts

Another sprang up near Alma and Excelsior, also in Oakland, an hour later, as leaders in the Bay area city, as well as neighboring Antioch and Hercules, have been speaking and spreading the word, especially as early spring weather sits in.

At about 3:15am, the group on the bridge, was spotted, a week after the Oakland Police Department responded to a hit and run following another side show.

In that case, officers responded to a collision in the 400 block of Burma Road around 8:30pm on March 30, and learned that a litany of vehicles participating in a sideshow were responsible.

They found that a car that was participating in the sideshow had collided with another vehicle causing it to overturn, before fleeing the scene in another car.

That incident, as well of the seven others over the weekend, are currently being investigated. It's unclear if the they were made up of the same crowd, or if different groups showed up to each site. 

Then, more than two hours later, another two sideshows surfaced a few miles up the coast in Oakland, where officials recently passed an ordinance to toughen legal steps it can take against those involved in the street-stopping events. As if writing, it remains unclear if any arrests were made

DailyMail.com has reached out to the city's police departments, as sideshows continue to be a mainstay in liberal-led Oakland.

Headlines indicating as such include 'Video shows illegal Oakland sideshow with cars on fire' and 'Oakland sideshows draw 500 vehicles.' 

One incident last summer saw 80 vehicles seized by the police. At another, an 18-wheeler was seen performing donuts in a widely trafficked road.

The demonstrations,  all illegal, have spurred plan to put in place more barriers in intersections deemed to be hotspots, including the Bay Bridge. 

As if writing, it remains unclear if any arrests were made. Cops in Mountain View said they were investigating the incident that saw the woman injured.