Yes, hes used 3 bars on that corner combo. If you can notice that Kabal's normal Hook Slam does one simple slam and that's it. With the AMP version of it, it does more than one spin. Get it now?
I was just messing with this as a situational thing like jump kicks or hop aas when they're cornered. Off of a jump kick you can get 379(maybe more with the d1 before the second 23) without any offensive meter.