I went as the Invisible Man for my sister's school's Halloween dance/costume contest thingy, and got second place. The winning costume? A kid who pretended to have a stick in his brain.
The funniest part was, when they called my name, I thought I had won, so I threw up my arms and cheered, then ran towards the stand, triumphanty yelling "That's ME!! I WON!!" Of course, when I got there and saw all the other kids, I thought, "Who are they?" Then I learned that I had just gotten to the finals and won second place. Pfft.
Oh, and believe it or not, another kid there went as Gordon Freeman. Excellent job, too (must've used my advice).