Bolt Lift

Bolt Lifts are a set of four bolts that serve as platforms in Super Mario Bros. 3. They only appear on Airships, and even then only late in the game. Like Donut Lifts, Mario and Luigi must continually jump to avoid falling. However, with each jump, the Bolt Lift moves to the right slightly, so they can be used as a transport above bottomless pits or dangerous Rocket Engines. Interestingly, bumping a Bolt Lift from below moves it to the left.