Garviel is sidestepped, and the slash and scabbard forces him to defend himself with a clumsy sweep of the chainsword, out of place and extended from the earlier thrust. Combined with the bad angle of the defensive sweep, he's easy enough prey for the staggering effects of the snap kick, his footwork briefly baulked by the strike, though he doesn't look to have been harmed by it. His blade dips as he turns, briefly out of position due to the desperate defense he just attempted, leaving an opening that Signum may be able to exploit.
LOL I was hoping I'd get the megablush emote too, darn.