Sulphide Depressant Question6

This question test your sense of humour to find the Sulphide Depressant that works best for you. What Do You Think of This Joke?

It's strange, isn't it. You stand in the middle of a library and go 'aaaaagghhhh' and everyone just stares at you. But you do the same thing on an aeroplane, and everyone joins in.

Funny Not Funny