There's this drunk guy who decides that he wants to go fishing. He packs up all his tackle and sets out in search of a suitable spot.
Eventually, he stumbles across a huge area of ice and decides that he'll give it a go. Taking out a saw from his tackle box, he starts to saw a whole.
Suddenly, a loud voice booms out at him, "There's no fish in here." The drunk looks all around him but can't see anyone. He decides to ignore the voice and carries on sawing.
Again, the voice booms out, "I've told you once, there's no fish in here!" He looks up again but there's still no sign of anyone so he returns to his task.
"Stop it!" shouts the now very angry sounding voice, "You'd better pack up your stuff and get out of here or there'll be trouble."
"Who are you" shouts the drunk guy, "you don't scare me!"
"Look," replies the voice, "I'm the manager of this Ice Rink!"