As a man passed with his car from in front of the mental hospital, his cars tire exploded. After that; picks up the spare tire from the car trunk, removes the exploded tire from its place.

At that moment the bolts fall down from the sewer hole. The problem is great, there is no bolt to attach the spare tire.

Helplessly started to thinking about what he can do.

Meanwhile, a lunatic man calls him from the mental hospitals garden.

Hey! What are you doing there?

My cars tire has exploded, I have to attach spare tire, but I dropped the bolts in to the sewer.

Lunatic man laughs;

This isnt a problem. Take one bolt from the other 3 wheels and attach it to the spare tire. So, all the wheels will have 3 bolts and you can continue to your way.

The man is amazed and asked;

How could you think that? Well done to you!

Lunatic man laughs again;

Im crazy, not stupid!

Very clever.