Husband and wife are waiting at the bus stop with their nine children.
A blind man joins them after a few minutes. When the bus arrives, they find
it overloaded and only the wife and the nine kids are able to fit onto 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 as he
taps it on the sidewalk, 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 at the end of
YOUR stick, we'd be riding the bus so shut the hell up."