So I hoped on JnH Kitpvp today and a friend @csq showed me this fun little glitch that isn't abusable and or harmful to anyone. Basically u find the spot in the anvil where it glitches you back and forth and you jump til it puts you in the block
For anyone that wants to try this - I discourage it. It's possible the AC will detect you for some sort of cheats and may kick/ban you. It's a waste of time for all of us. :D
gg but as ^^^^^ said, the AntiCheat is very strong and will detect weird movement and lag (can result in a ban) So be careful my friend! :)