one quick question,how the hell tyrant hit confirm f4 Ex GG ?
It's all about the frames -- if you miss with it it recovers extremely quickly, and if blocked you're still at neutral and can continue to pressure. So it's useful in mixing up your pressure/blockstrings to catch people off-guard, and that's what Tyrant sometimes does.
Regarding the f4 ex GG, the first two times that happens it's a punish; first to punish a blocked point-blank ground saw, and then to punish an accidental point blank grounded gas blast.