* the guy watching, a warden of the hospital, called road service?
* the guy at the car, a male nurse, returned to the hospital and used his work car to get home?
* the friendly inmate who saw the dilemma of the stranger changed the tire for him?
While home and hospital were far away from most places it was near to each so he could limp home with three wheels?
The driver, an experienced stunt driver, drove home on two wheels?
If each wheel was attached with five bolts, he was five down and had fifteen to go. Take one from each that were left and drive home with 4-4-4-3 and an imminent trip to a repair garage?