A man, his wife, and seven children were waiting at a bus stop. After
some time a blind man joins them. The bus arrives. The blind man and
the large family find themselves walking because of the crowded bus.
The blind man starts tapping his stick on the road, which seems to
annoy the husband who shouts at the blind man...
"Can't you put a rubber thing on the end of your stick to avoid that
irritating noise."
To this the blind man replies...
"If you would have put a rubber on the end of your stick we all would
have been on the bloody bus."