Wow i cant believe i found this thread...

i recognized the sample as soon as i heard it. it is taken from Iron Man on the games Marvel VS Capcom 1 and 2. when he says "PROTON CANNON!!" before his soecial move. I mean i could be wrong but i never second guessed it and when going back and checking the game it is defintely VERY close. hope this helps ease your mind :)