Halloween is the holiday to get creative. From goulish decorations, to creepy ideas on appetizers (à la "severed cheese fingers"? Search WonderHowTo for that one), to making a bloody shower scene in your bathroom (another one on WonderHowTo: Search "halloween party decor").
In this CHOW tutorial, we look into how to make a punch with dry ice, so it smokes as if its a witches brew. A great way to enhance any Halloween party.