It happened around 2 a.m. Sunday along the eastbound side of the Bay Bridge.
Cars were seen doing donuts as fireworks set off.
Some people parked on the bridge to watch the spectacle, while other drivers got stuck in it.
MORE: Bay Bridge sideshow one of several reported around Bay Area over the weekend
Bay Bridge sideshow one of several reported over the weekend
The sideshow went on for about 25-minutes before traffic resumed, sources tell ABC7.
CHP tells us more than 150 cars took part in the sideshow.
Some participants even pointed lasers at a CHP helicopter.
The CHP says the sideshow started breaking up around 2:20 a.m.
They took several people into custody tied to a hit-and-run crash and a separate police chase.
Another sideshow happened at the Bay Bridge back in April.
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