The pumpkin thread made me think this one up, and I didn't see any others along these lines. I was just wondering if anyone had pictures of good costumes from the festivities this year. If you don't believe in / celebrate this strange and wonderful holiday, enjoy a bunch of yanks making fools out of themselves.
Friday night my original costume idea fell apart, so I had to go with plan B: Steven Seagal. If the quasi-silk shirt were tighter it would have been a stronger costume, but alas it was a fallback.

On Saturday night I had more time for construction. 120 ft of aluminum foil, 1/2 a roll of duct tape and 1 cardboard box later balloon boy was born.

Unfortunately the best costume that I saw all night was not documented as I didn't have my camera. Three guys as different Tetris pieces, the 4th as a Gameboy. Gameboy dude had a boombox (yea they still have those...) with the Tetris theme loaded up, and when he hit play the three pieces would all fit together. Best costume I've seen in many a moon.