Hecarim's E

Hecarim's E feels very overpowered. if someone has the reaction timing/skill to interrupt it before it actually hits someone, while does it still go through? An example i can give is like Lee sin q: Is he gets hooked/cced before he gets there, he stops dead and the action failed, and the same situation should apply to hecarim in that if his e get interrupted it's damage and knockback shouldnt go through