Originally Posted by anaxilea

momochan: Just wanted to point out that this only works with diet coke, not normal. So your adventures in pranking wouldn't have been ruined by a dud. ^^ Also, in a pinch, sugar can serve as a substitute for mentos, though the explosion won't be nearly as good. My friends and I used to drop konpaito (colored Japanese rock candies) into our teacher's, lol.