The Playboy Club star was neck-and-neck with reality star Brody Jenner during the 36th Annual Pro/Celebrity Race in Long Beach when the two crashed in the middle of lap three, destroying Cibrian's vehicle.
He tells EOnline.com, "Carnage happened. It (my car) did a 180!"
The wreck meant the actor came in last place and Jenner was forced to bow out entirely since his car was beyond repair.
Sons of Anarchy's Kim Coates and The Pianist star Adrien Brody were also involved in collisions - Coates dropped out of the race while Brody managed to finish in eighth place.
It was comedian Adam Carolla who saw off the competition to snag first place for a good cause - car company Toyota plans to donate $5,000 (£3,125) in the name of each celebrity and pro driver participant to Racing for Kids, which benefits critically-ill children.