A husband and wife are waiting at the bus stop with 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 the eight children are able to fit into the bus, so the husband and the blind man decide to walk.
After a while the husband gets irritated by the ticking of the cane of the blind man and says to him, "Why don't you put a piece of rubber at the end of that stick? That ticking sound is driving me crazy!"
The blind man replies, "If you would've put rubber on the end of YOUR stick, we'd be on the bus right now!"