Fear can sometimes be a useful emotion. For instance, let's say you're an astronaught on the moon and you fear that your partner has been turned into Dracula. The next time he goes out for the moon pieces, wham!, you just slam the door behind him and blast off. He might call you on the radio and say he's not Dracula, but you just say, "Think again, bat man.".
In Deep thoughts
Quotes, by Jack Handy