Marvel vs Capcom 2/Suki Cancel
A "Suki Cancel" is the act of cancelling a normal attack into a superjump then immediately cancelling that superjump into a block. It is only possible if there is something onscreen causing your character to block. The easiest way to do this in the Training Room is to have the other player perform Guile Somersault Kick THC glitch (or the Ruby Heart Ghost glitch).
Suki Cancelling is not typically useful, but can be used in combo videos to perform normally impossible moves. It can also be used to charge meter very quickly, as you are able to cancel moves earlier than normal.