 One common variation is that a fair touch must be below the waist, or, with two hands, or, to encourage rucking, a small non-contact ruck may be formed when a player is "touched".The "touched" player must fall to the ground as he would if he were tackled, and then two players from the attacking team must "ruck" over him within three seconds to keep possession of the ball.A scrum-half then recovers the ball, and play continues.