Charlie was playing with his little brother Mickey when the little 
boy asked whether he could fly like Superman.
"Sure you can, Mickey," Charlie said, "Just flap your arms
really *really* hard."  
So Mickey climbed up on the windowsill, started flapping like 
mad, jumped, then smashed into the ground six stories below.
Horrified, their mother came screaming into the room and 
said, "What the hell happened?!?"
Charlie said, "I was just teaching Mickey not to believe
everything someone tells him."