A husband and wife are waiting at the bus stop, with them are their 8
children. A blind man joins them after a few minutes. When the bus arrives,
they find it overloaded and only the wife and her eight children are able to
fit in the bus. So the husband and the blind man decide to walk. After a
while the husband gets irritated by the ticking of the stick of the blind
man and says to him.

"Why don't you put a piece of rubber at the end of your stick, that ticking
sound is driving me crazy!!"

The blind man replies: "If you would've put a rubber on the end of YOUR
stick, we'd be sitting in the bus.