I would Honestly Say He's Hacking because Isn't He TheSlayer521 or Something Like that? Anyway I was On Op-PvP, and This Took Place Underspawn He Had, Kill-Aura, Anti-kb, and Aimbot. So I Would Say he Was Hacking Sorry, Klutzy Well if You Want To Get Better at PvP, Then Just Now, and Then Start 1v1ning People, or Just PvPing in Op-PvP. The Reason Why I said Op Because You've Got Gapps, Over On Kit You Have Normal Which aren't that Powerful as Gapps. Just Pvp In The Arena Or You Can Practice By 1v1ning friends If You Want. Trust Me, You'll Way Better. Just Keep Trying.
Don't worry guys, there's some good mods out there <3 Also @Pile_of_Butts I totally agree! A lot of mods who used to use hacks (or have tested them out) can provide a lot more insight and can tell much easier if a person has hacks than someone who doesn't.
Not lag, lol. Also he is moving fine throughout the water, taking little to no knockback at all. No other possible explanation other than the fact that he may have been toggling anti - kb.