CHP officers confirm that, yes, someone actually did doughnuts on the Golden Gate Bridge last weekend.

The spectacle, which was posted on Instagram by one of the people likely involved (with the fitting handle the_ssnoopy_sideshow), took place about 12:30 p.m. Sunday, according to Officer Andrew Barclay. He said that, obviously, the car tricks weren’t a smart thing to do.

“If you watch the video, you can see that the vehicle is spinning within inches of a guardrail where there are tourists,” Barclay said. “It put a lot of people at risk unnecessarily.”

Kary Witt, bridge manager for the Golden Gate Transportation District, called the episode “unbelievably stupid, unbelievably dangerous.”

He said he’s seen U-turns on the bridge, people stopping to take pictures, and some very high speeds. “A lot of dumb things happen on the bridge, but not this,” he said. “The margin for error out here is pretty small. It’s really kind of shocking when you see people behaving this way.”

The driver of the older model black Chevy Camaro appears to have been part of a group that methodically stopped traffic and staged the sideshow, authorities said.

After several 911 calls from motorists, CHP officers pulled over one car that appeared to be involved. However, no arrests have been made and Barclay said he couldn’t comment on details of an active investigation.

KRON-TV′s Stanley Roberts, who reported the event Tuesday, said it’s the first ‘sideshow’ staged on the landmark bridge.