Roller is a skill that can be given to a lemming in Lemmings 2: The Tribes. A Roller curls up into a ball and rolls to move quickly along the floor. It can ramp up sloping terrain and jump slightly from the ground. Rollers will stop if they are given another skill (other than a permanent skill or exploder), hit a ceiling causing them to stun, fall too far causing them to splat, or get caught in a knockback explosion. The Roller behaves similarly to a Skier on flat terrain, but continues rolling at the same speed on slope whereas the Skier speeds up or slows down.