Taarak Mehta Ka Ooltah Chashmah S01 E20 Humour is very good for the health

"Problems Toh Hain Sabke Saath, Bas Nazariye Ki Hain Baat!"

It is indeed said that humour is very good for health. But what if it becomes dangerous? Jethalal's behaviour becomes very humorous and all the society members are making fun of him. How do people take advantage of his situation? Will Tarak Mehta be able to solve it?