Pumpkin pie eating contest. Find the small plastic Halloween toys buried in pumpkin pies with tones of cream!
Find 5 thing's in 10 pies; you have 120 seconds and your hands must be tied behind your back. Lose and have a bucket of green slime all over you. (You could tie your ankles together for good measure too, might be harder and funnier getting to all 10 pies)
You should be dressed as a spooky Halloween clown whilst doing it.