LIVERMORE -- A Livermore man is without one of his feet after driving recklessly around a parking lot, sticking the appendage out his car door, then severing it off on a cinder block, police said.

The man was later arrested on suspicion of drunken driving.

Police responded to the parking lot of a storage facility on Rutan Drive about 4:40 p.m. Wednesday to find Jon Buna, 31, with his left foot severed at the ankle and accompanied by a frightened woman, Officer Traci Rebiejo said.

The woman told police that Buna, who parks his two-door BMW at the storage facility, got into his car, and while she was in the vehicle, began driving recklessly around the parking lot, at which point he stopped and she got out, Rebiejo said.

The woman said Buna's driver's side door was wide open, and Buna stuck his left foot out as if he were going to exit the car, Rebiejo said.

The car swiftly accelerated to about 20 miles per hour in a reversed arc and ricocheted off a trailer, a pole, and two rolling storage doors before hitting a dividing cinder block that ultimately severed his foot between the block and the vehicle, Rebiejo said.

The man was then able to park his car back in its parking space as the woman called for help, Rebiejo said. Officers arrived on scene and arrested Buna on suspicion of DUI shortly thereafter.

His blood alcohol results are pending.

Contact Erin Ivie at 925-847-2122. Follow her at Twitter.com/erin_ivie.