[GAMEPLAY] Warwick "Cannot be disabled."

After the Warwick is done ulting, he uses his q on me at the same time the Bard ult hits him. For some reason it makes him immune to Bard's ult even though it is not a displacement, and he didn't even hold down his q. https://drive.google.com/file/d/0B2btCm9OpD59N3FlWmVlQk5kd3M/view?usp=sharing