This is a easy prank that requires
1. A bottle of diet coke
2. String
3. A mentos
4. A friend that likes diet coke

Step 1: Getting Started

Tie string to mentos

Step 2: Hardest Step

Get the end of the string hidden in the cap.

Step 3: Give Bottle to Friend

Give it to the one you prank and when they open the bottle pop will shoot up.
You need diet coke...
You are totally right, thanks for correcting me. I'm gonna see if I can change that.
Won't this try to explode once the mentos gets wet? Way before the cap gets opened? Don't know if it would explode, but.....?
well you gotta make the string short enuff so it doesnt go in

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