(ppa0 on Emo$ account) id say professionally prolly not really, but once in a while when you play fox or falco and you know they are gonna mess up because they forgot to sweet spot the edge, you can put 1 in there, and usually they are gonna try to up+B as fast as they can, and right there you can just jump off the stage and hit em wif an aerial, but most good or pro foxes/falcos wont mess up like that to give you the chance to use that, as for ground fireball, don't really know but its kinda slow and laggy so... yeahz... i can upload some vids of that later if ud like to show u some examples,