A motorcyclist slid into a boulder after he was ejected from his bike during a crash in the 12500 block of Vance Jackson Road, San Antonio police said.

The 21-year-old motorcyclist was speeding down Vance Jackson when he lost control of the bike, slid several feet into the boulder and became airborne, San Antonio police said.

The motorcyclist was taken to University Hospital in critical condition. San Antonio police said he was wearing a helmet, but suffered several broken bones.