Traveling to tournaments isn't just for the tournament. If you like the game rnough to post here you'll benefit from joining the community at an event. Like going to a convention for any interest, you see cool things and hang out wih like minded people who are into what you're into.
On the specific of getting 90 damage off one hit, it's possible but not likely or necessary. It's not common in any game but people should definitely play virtua fighter more to understand real Defence, movement and guaranteed punishment. DOA just needs a bit more (sit down stuns with no SE or hold, that can lead to CB!)