After the man was handcuffed and placed in a patrol car, he banged his head on the cage in the cruiser, causing a big gash on his head, said Sgt. Jim Prendergast of the San Antonio Police Department.
When an officer opened the door of the cruiser outside the Brady Green Clinic, the man took off running, police said.
The handcuffed man then began flagging down passing vehicles until someone picked him up, police said.
The man was dropped off at a home in the 1000 block of West Poplar, where he was found trying to hide in a shed behind a home.