Funny Comeback

An old man walks onto a bus one day. All the seats are full, so he has to stand and balance himself on his cane. The bus hits a bump and the rubber tip of his cane breaks off and he falls. Little Johnny, seated nearby, says to him, "Sir, you have to pull the rubber over the tip more carefully!" The man replies, "If your dad had done the same, I would have a place to sit on this damn bus!"