suppermariobroth:

In Super Mario Bros. 2, a shortcut exists on top of the waterfall in Level 1-3 that requires jumping over a large gap to the left of the vine. The jump is easily done with Luigi or Princess Peach due to their enhanced jumping abilities, but even Mario and Toad are able to reach the door by using this trick. The small decorative clouds over the pit are coded to allow throwable objects to stand on them. Thus, it is possible to throw a Mushroom Block on one of the clouds and jump across as any character.