The Truck Driver and the Tyre :

One truck driver was doing his usual load delivery at a mental hospital, by parking his vehicle beside an open drain. He discovered a flat tyre when he was about to return from the mental hospital. He jacked up the truck and removed the flat tyre to fix the spare tyre.
When he was about to fix the spare tyre, he accidentally dropped all the 4 bolts in the open drain. As he cannot fish the bolts in the open drain, he started to panic as to what should be done?
Just then, one patient happened to walk past him and asked the driver as to why he was looking troubled. The driver thought to himself, since there is nothing much he can do or this mental joker can. Just to keep the bugging away, the truck driver informed the whole episode to the mental patient and gave a helpless look.
The patient just laughed at the truck driver and said you just cannot even fix such a simple problem? "No wonder you are destined to remain a truck driver for life".