When a person farts on one of those long plastic bench seats at McDonalds and it makes thunder sounds. If done well enough, people on the other end will both feel and hear the thunder.

The idea is to do it as slowly as possible to get the greatest effect from the other patrons in the restaurant.
We knew we would probably be asked to leave when Micajah sat down at the thunderseat.
by MrCoffee February 27, 2003
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