A theater configuration where the audience surrounds the stage on Three sides, in a U-shaped arrangement. There is a "back stage" area on one side of the acting space. The name comes from the fact that the stage Thrusts into the audience. Sometimes also referred to as 3/4 round, or three-quarter thrust. A thrust can also refer to platforming or staging that extends the Apron of a stage out into the audience area, creating a larger surrounded playing area.