Chasing elephants!

A man is driving on a city bus with a newspaper on his knee.
From time to time, he rips a piece off, ripping that piece into smaller ones and throwing them out the window.

A passenger standing near him asks:

-Excuse me, why are you throwing pieces of paper out the window?

-I’m chasing away the elephants

-Chasing elephants? There aren’t elephants in the city.

-Well that means it's working!