There's this bloke drinking in a bar twenty stories up. Suddenly he opens the window, steps out, gently floats down to the pavement, walks back inside, gets in the lift, and returns to the bar.
All the other patrons are absolutely gob-smacked.
Half an hour later he does it again --- opens the window, steps out, gently floats down to the pavement, walks back inside, gets in the lift, and returns again to the bar.
One of the other drinkers comes up to him and says;"Excuse me, but I couldn't help but notice you, --- how did you do that?"
"Oh it's easy," said the first bloke, "simple physics. You drink beer, beer's cold and full of gas, the gas expands as it warms in your stomach, you become much lighter, and so you just float down to earth. It's fun. Try it."
So the second bloke did.
Opened the window, stepped out .....
SPLAT!!! on the pavement twenty floors down.
The barman looked at the first bloke, shook his head, and said; "You know, you can be a real s##t when you've been drinking Superman"

johnboy