haha, I hit his ass with a grenade one time, he was on a cliff, and I was under the cliff, I just threw a grenade up and heard "UUUH!" ago down a bit, I was like hell yeah!
also the first time I fought him, I was searching for him through my rifle scope, then I heard a noise, and the camera zoomed out of the rifle scope, and the End was just standing right behind and instantly shot and killed me...haha