An old man gets on a bus.
There are no Seats so he stands and leans on his walking stick for support.
The bus brakes suddenly at one stage and he slips.
A young man sitting in a seat next to him says,
” Hey, Mister if you had a rubber on the end of your stick that would not have happened”.
The old man replies
” If your father had taken the same advice I would have a fecking Seat.”