A husband and wife are waiting at the bus stop with their 9 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 footpath, and says to him, “You know if you put a piece of rubber on the end of your stick, I wouldn’t have to listen to that tapping.” The blind man replies, “If you would’ve put a rubber at the end of YOUR stick, we’d be on the bus.”