3 guys at a bar . . . . .

[Carsman]

.

Three guys walk into a bar.

The barman tells them, "If you can sit in my basement for a day, I'll give you free beer forever."

The first guy goes in and walks out after five minutes and says, "It's impossible, you got a swarm of flies in there."

So the second guy tries his luck, but can't take more than an hour, and comes out.

Finally, the third guy goes down. When he returns a day later, the others ask him how he did it.

He says, "Easy! I took a dump in one corner and sat in the other corner!"