A Penguin Trick
This one time my brother set up a vertical line of bumpties in the level designer for Super Mario 63. When he was testing it he discovered how you can climb up a vertical line of bumpties. To do it, if you're on the left side of the line of bumpties, hold right and up together without letting go of either key on the left side of the line of bumpties, but if you're on the right side of the line of bumpties, hold left and up together without letting go of either key on the right side of the line of bumpties. 