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The act of first placing a tube of Mentos candy inside the anus, and then quickly yet carefully sliding a newly opened Coke bottle (neck first) into the anal cavity. The participant should be on all fours with their ass up in the air with the bottle pointed upwards. The Mentos and Coke will react, and launch the Coke bottle out of the ass and high into the air like a Rocket at the Science Fair.

This project is almost guaranteed to win any Science Fair
We were in the bedroom, things were getting hot and heavy. But then I got exhausted, so I stepped out of the bedroom to get a refreshing Coke. When I came back, she had a Mentos in her hand and was pushing it in her ass. She told me she wanted me to win the Science Fair Project, so I just went with it.
by QueenAndPeasant August 09, 2017
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