Like the trust fall, but a guy (or girl) raises their leg up to a 90 degree angle and then a guy places his genitals on the persons leg, trusting that they will not kick their knee up and hitting their genitals.
Boy 1: Leg Trust!
Boy 2: No way, you just want to fell my balls rub your leg.
Boy 1: Just do it.
Boy 2: Alright
Boy 1: <kick>
Boy 2: FFFFFFFUUUUUUUUUUUU!
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