How do you do a high triple jumps on new super Mario bros on a Nintendo ds?

Unlike in Super Mario 64 and Super Mario 64 DS triple jumps can only be done at full speed in this game.

Press and hold the run button and left/right till you reach full speed (Mario or Luigi will lean forward). Do not release the direction button or the run button. Jump once (tap for a low jump or press and hold for a higher jump) but keep the run button and the direction key pressed. The moment you fall down again jump again (this jump will be higher and Mario/Luigi will use a different movement) without releasing run or direction keys. Upon impact with the ground again jump to do a triple jump (Mario/Luigi will jump very high and flip in mid air).