The beginning of head banging out of anger.

This is Liam banging his head out of anger. This only shows a brief glimpse of the severity of his tantrums, I didn't want him to do it for long, but I just had to video tape it for a record. To break him of this behavior, I sat in his room for 3 hours every night and wouldn't give any attention and when he started to bang his head I would get up and put him back on his pillow and sit back down without saying a word or looking at him. I did this for 2 weeks and he finally stopped this behavior for bedtime. But he still acted out when he was mad during the day and I would restrain him for hours until he stopped fighting me.