SuSa
Banned via Administration
It depends on the property of the usmash and what hits first...sure there is, what if snakes dair connects with a Usmash?
Aerials have no priority, it's whatever hits the hurtboxes (you hit your opponent or the other way around)
Eg;
Try to beat out Olimars Uair with an aerial.... you need a long reaching, and well timed aerial (aka; disjointed and perfectly timed) to hit Olimar (FROM ABOVE)