not sure, sc is normal but after that we can see him doing 2 dodges (in less than a second) in which he barely moves positions, idk if its possible with current sprintkey
basicly he sc with stab the first time then since he still got the ps slash and dodged (for sc) his character didnt had to do another dodge like normal aw but just ww, is complicated to explain but thats how it works, is just the perfect dodge timing before a push
i would say this if his character is at the same position after the heavy slash
but look closely, his character got pushed because of the heavy slash and he still rs from it