Four high-speed motorists who disrupted traffic on the Bay Bridge with a display of show-off driving and “doughnuts” found their sideshow come to an unexpected end after a stalled motorist captured the display on a cell phone camera and alerted the California Highway Patrol, officials said Monday.

The incident began around 3:30 p.m. Sunday when Bay Bridge motorists observed two Ford Mustangs — one black and one white — a Chevrolet Camaro and an unidentified maroon car speeding westbound on the bridge at up to 90 mph, weaving through traffic.

Back to Gallery CHP officers slam the brakes on Bay Bridge sideshow drivers 4 1 of 4 Photo: California Highway Patrol / California Highway Patrol 2 of 4 Photo: California Highway Patrol / / 3 of 4 Photo: California Highway Patrol / / 4 of 4 Photo: California Highway Patrol / /







Several minutes later, the speeding motorists stopped traffic on the bridge west of Yerba Buena Island and the driver of one of the Mustangs performed four “doughnuts” across all five lanes, spinning his car in circles, sending clouds of white smoke into the sky, and leaving a pattern of black skid marks on the bridge roadway.

After a stalled driver captured the exhibition on her cell phone camera and alerted the CHP, officers posted themselves at the western end of the bridge and apprehended the scofflaws.

The driver of the black Mustang, identified as Moises Rosales and described by officers as being in his early 20s and a resident of San Leandro, was arrested for reckless driving. His vehicle was impounded. Another driver, whose name was not immediately released, was cited for aiding and abetting, and released. It was not known what happened to the drivers of the other vehicles.

The suspects posted a video of their stunt on social media, which the Highway Patrol quickly incorporated into the case against them.

“It certainly makes our job a little easier,” said Officer Vu Williams, a CHP spokesman.

Steve Rubenstein is a San Francisco Chronicle staff writer. Email: srubenstein@sfchronicle.com Twitter: @SteveRubeSF