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Mentos and Diet Coke
Diet coke fountain!
To create a large fountain of diet coke with very little cash, buy a box of Mentos and take out about five. Then, walk or drive to a grassy park or field that people wouldn't lay on.
Break or cut the Mentos in half, then take a bottle of cold diet cola and drop the ten halves in at the same time. (note: don't point the bottle at your face)
If you have enough cola, test how many Mentos you need to get the highest fountain.
Flags: Very Short (0-60 mins), Solo, With a Friend, With a Group, Children, Teens, Adults, Seniors, Outdoors, Morning, Day, Sunny, Snowy