Jesus Christ, you might need law enforcement to intervene at this point if you fear for your life. That's most definitely not good at all.

I've been threatening to call the police, yeah. The problem is, then he calms down just enough that I can't justify it. This guy is a master manipulator.

right n ow it's calm again, I'm in my room with the door locked and for once he is not pounding on it and demanding me to come out sooo, we'll see I guess. Thank you for caring, man. Going through this is incredibly isolating and so it just means a lot to hear from people that care. :)

Record an audio clip, put your phone in your pocket or hold it in your hand. If he gets physical with you make sure you have it and call the police asap. That is unacceptable. Be sneaky. Can you not leave the house? Like stay at a friends?

Could try secretly recording him and upload it somewhere safe?

I would also try to distance from him as soon as possible. Even if it means moving in with family.

I managed to get one video, yeah, problem is, things with him are so random and so quick and violent that I havn't been able to get much. Thanks for the idea though. It's something I've started attempting more often.

I agree with Tex on this one. Worst case scenario, they'll just suggest moving out (because money grows on trees!) BUT they'll have a record of the chat and that means if anything happens (be it bruises or a lot worse) it'll get looked into.

Doesn't sound like behaviour you'd expect from someone above the age of about 12 though O_o The mocking and throwing hissy fits is something we grow out of before we leave school. Unless he has some kind of learning disability that makes him behave like a child... But if that were the case, you'd think he'd know of it and do his damnedest to act like a rational adult ;)

Are you unable to leave?

Second time I see you write about this on here.

People rarely change. Most of them do not ever change.

What you see now is what you going to see from now on.

You need to find a way to get out of there.

Sounds like he needs to stat taking CBD this could help him with thinking clearly and being more calm and reasonable ~
it has greatly help one of my friends that was acting similarly / manipulatively abusive /

i hope you can find a way to get free of his ill intended actions, dear. i really dont like to hear you are having a bad time for any reazon. just take care ok?
wish i could do more than send best wishes