Hi. I know literally nothing about martial arts and am just posting here to see if I can get some help (sorry if it's in the wrong section). I little while ago I got into a small fight with my brother and I grabbed him around the neck, with his neck in my elbow, for a few seconds. He screamed, (he screams a lot, so this probably doesn't mean anything) and so I dropped him, and he fell on his face. I held him only for a few seconds, maybe four. Anyway he was on the ground for a second or two, and he was screaming, and when he got up he said he was feeling completely okay. He did bite his lip pretty bad and was bleeding from his lower lip quite a lot, and that really scared me at first because I thought I seriously hurt him. (There was no blood beneath his nose, and his lip became very swollen though so I think that is the case) I only realized he blacked out because he told me he couldn't remember hitting his head. Anyway, it made me very worried (especially the screaming) so if anyone can tell me if maybe this is what is expected to happen it would put my mind at ease. If anything is out of the ordinary... well, please tell me.