When someone rides a harnessed Happy Ghast and forces it past normal flight speed, the plugin snaps them back: passengers get ejected, the ghast is teleported to its last valid position, velocity is zeroed, and any boosted flight attributes are reset to vanilla. It watches movement every tick — player moves while riding, vehicle moves, and a continuous position scan — so packet tricks and attribute boosts don’t slip through. Normal Happy Ghast flight stays smooth; only illegal speed gets punished. Simple config: one value (max-blocks-per-tick) controls how far a ghast may move in a single tick. Vanilla sits around ~0.18; the default limit is already generous.