Wheel Substituation

[stevesmith]

Another time you'll see an abreviated version of this is when a team is a man down. When the penalty expires, the player in the box will step on to the attack side, and a player standing at mid-field will then run straight back to even things up on the defensive side. As glbski said, it cuts down on the yardage, and it gets a player back into the play a couple of seconds quicker.