A truck driver was doing his usual delivery to IMH (Institute of Mental Health). He discovered a flat tyre when he was about to go home. He jacked up the truck and took the flat tyre down.

When he was about to fix the spare tyre, he accidentally dropped all the bolts into the drain. As he could not fish the bolts out, he started to panic.

A patient happened to walk past and asked the driver what happened. The driver thought to himself, since there was nothing much he could do, he told the patient the whole incident.

The patient laughed at him and said, "Can't even fix such a simple problem? No wonder you are destined to be a truck driver..."

Then the patient continue his saying, "Here's what you can do. Take one bolt each from the other three tyres and fix it onto this tyre. Then drive to the nearest workshop and replace the missing ones. Easy as that..."

The driver was very impressed and asked, "You're so smart but why are you here at the IMH?"

The patient replied, "Hello, I stay here because I'm crazy, not STUPID!"