trust fall
n.— «I can’t tell you how many times I’ve attended an orientation or team-building activity and been forced to play the same game. You’ve all done it, too: Commonly known as the “trust fall,” participants are required to pair up and alternate turning their backs to their partners and folding their arms across their chests. One partner then calls out “falling,” to which the other partner responds, “fall away,” implying he is ready to catch you.» —“Forget trust falls; be sure to watch your back” in New York University Washington Square News (New York City) Apr. 4, 2008. (source: Double-Tongued Dictionary)