No idea what he was doing. Maybe the end of the punch got him in the eye and bothered him, but it wasn't enough to pause the fight and that left him right open for a huge punch.
Love Bobby, but I don't think Izzy was a good matchup for him at any point in his career. Izzy isn't biting on the same feint 3x in a row and commands distance ridiculously well. You don't catch him with shots like that until you've made his legs useless.
So with the Pereira - Prochazka rematch happening this weekend, some UFC shills are going on about how their staredown in the first fight was the best staredown ever.