Three Smart cars were flipped in the Ingleside and Bernal Heights districts.
A witness said he stepped outside to smoke a cigarette when he saw eight people with hoodies on walk up to one of the cars.
"I thought they looked like they were up to no good and then sure enough they walk up to this Smart Car right here, all huddle around it and just lift it up and set it on its hind legs, like a dog on its hind legs, -- that's pretty much it," said witness Brandon Michael.
San Francisco police are continuing to investigate and have not made any arrests.
