Players randomly and unexpectedly jump up in to the air. At some time in the air they clap their hands. Since other players are also randomly jumping and clapping simultaneously the name popcorn seems appropriate. If two players clap their hands at the same time they are out of the circle.
One player in the circle chooses a random player across from them in the circle. They signal the selected player by making eye contact, lunging into the circle and clapping “at them.” This process continues until there are claps flying back and forth across the circle.