Bloody Popcorn
This only works if you add your own margerine to your popcorn. Just add a little bid of red food colouring to your margerine, and then pour over your popcorn!
Witches Brew
In a clear punch bowl mix equal parts blue kool-aid and lemon-lime soda. Add some crushed dry ice, and continue to add more every half hour or so. Watch out! Don't let kids serve themselves, because dry ice can cause lips and tongue to freeze. Scoop it out yourself and leave the dry ice in the bottom.