A young man approaches the outside of a bar on a very rainy night.
As he's about to enter the bar, he notices an old man standing next to a puddle holding a stick with a string attached to it.
The young man asks the old man "what are you doing?"
The old man says "I'm fishing".
Filled with pity for, what is obviously an old, senile man, the young man says "hey, come in out of the rain and I'll buy you a drink".
As they're sitting at the bar, the young man asks the old man (smiling) "so, how many have you caught?"
The old man says "counting you? Eight!"