Alright so I was chilling with Bowser against a level 9 CPU Pac-Man, until I up-smashed him and this happened:
Yes, I killed him at < 39 percent with my up-smash as he was hitting the trampoline, basically carrying all the momentum from it + the up-smash knockback and kill potential. It worked because I hit him at the same time/few frames after he touched the trampoline, and not before, which would have looked like this:
In this case, you could see that Bowser didn't die even though he was way above the blast zone, because the knockback from the up-smash was keeped, but not its kill potential (don't know how it's called, but basically what makes you able to die off the top).
So there you go flash smashers, just wanted to show you this which happened to me just now, sorry if I bad englished cuz ima french baguette oui, and have a nice fight!