For tricks performed on obstacles such as rails, "frontside" and "backside" refer to the direction from which the snowboarder approaches the obstacle. A regular rider approaching a rail from the left side of the rail would be considered frontside because the "front side" of their body is facing the rail. A regular rider approaching a rail from the right side of the rail would be considered backside because the "back side" of their body is facing the rail. A regular rider doing a frontside spin onto a rail would rotate their body counter-clockwise and then land on the rail. A regular rider doing a backside spin onto a rail would rotate their body clockwise, and then land on the rail.