Anyways now that I think about it, if this is air tripping, and you can do aerials right away, instantly, then this won't be a problem at all and it does nothing more than gimp your recovery by taking away your Up+B. And how many times do you smash a direction after you're already OUTSIDE the stage, normally you start when you are hit, meaning on top of the stage, and if you trip, you will trip right there (lowering your horizontal momentum, thus helping your recovery, even though it takes away your Up + B), which will actually be good for you, because you don't go flying away, and you can do an aerial instantly if your opponent tries to punish you.
(Note that I do not believe this is Air Tripping, but in the rare case that it was then the above paragraph reflects some of the thinking I've done) (The above paragraph could be wrong and should not be taken as literal facts, it is just what I think this "trip" would be used like)