Found a pretty troll Zac bug
So I was chillin' on the SR playing Zac in the new Nemesis Mode, and I found that if you spam laugh while in the air off a fully charged E, HE RUNS WITH STUTTER STEPS REALLY FAST instead of flying. Pretty funny. It's kind of the same idea as spamming laugh while Q'ing with Riven to cancel the animations. Just bind laugh to an accessible key (that's where it should be anyway, especially for you Lux and Teemo mains)
Edit: doesn't have to be a fully-charged E, just anytime you'd be airborne off of E