Oh, that! Well, he intentionally fakes you out with the countdown before his fist slam attack, but it's not random, he picks one type of fakeout and sticks with it until he's taken enough damage to move on to the next. Sorry, I didn't realize that could come off as unintended behavior.
As for the slowdown on attacks, all of your attacks are slower if you try to use them during the enemy's turn, and the special moves are just the ones that are most affected by that. One thing that I do think I should've done is make those attacks stronger the more slowed down they are, but I didn't consider that until too late