Buuman
Smash Ace
Essentially I have tested this with other characters. It may be difficult for some to momentum cancel the right way especially vertically. You must input the correct DI first, left or right so you go up at an angle instead of straight up (First step). Immediately HOLD DOWN and press the C stick in the direction of the Forward air until the fair comes out. The Fair comes out and finishes much quicker than the dair. The key to this is, YOU MUST HOLD DOWN FOR THE FOLLOWING AERIALS IF YOU GET HIT VERTICALLY (Fair, Bair, Nair, and Upair) If you hold down, the effect is you get a FAST FALLING AERIAL. Try it out. Jump and do one of those aerials while holding down. A better way to test this is hold down before u even jump and mash fair. After u reach the peak of your jump(s) you'll notice that when the fair comes out (After the peak of the jump) You will auto fast fall that move simply by holding down on the control stick.
If you try this with your dair, you DONT need to hold down, the down c stick is a combo of (A + down tap). The key to the fast fall is the down tap. So since the dair has the down input already in it, it comes off as an easier way to momentum cancel, BUT IT IS NOT. Fair will let you last MUCH longer. So remember when you get hit up, HOLD DOWN and MASH FAIR...keep mashing fair and holding down for the sake of seeing the auto fast fall if u want. But the latter is the correct way to momentum cancel.
)
