A husband and wife are waiting at the bus stop with their nine kids. After a few minutes, a blind man joins them.

When the bus finally arrives, it’s packed. Only the wife and the nine children are able to get on.

So the husband and the blind man start walking.

After a while, the husband, clearly annoyed by the tapping of the blind man’s cane, says,
“Hey, why don’t you put a piece of rubber at the end of your stick? That ticking is driving me crazy.”

The blind man replies,
“If you had put a rubber on the end of your stick, we’d both be on that bus. So shut the hell up.”