animation packs that aren't the default can provide an advantage for players. see this run https://www.speedrun.com/roblox_split/run/ywqxo3py, which uses a method of clipping which is far slower and less consistent on normal animations. Other levels can benefit from other animation packs, such as the levitating animation pack allowing for higher jumps. This can provide an unfair advantage for players, as animation packs cost robux. These should be banned to level the playing field, and runs using them should be removed.