Reflecting on people you knew and wondering, were they a straight up psychopath? is definitely an unsettling experience. Weird that you mentioned strangling in particular. I had an ex that randomly started grabbing at my neck and trying to strangle me while we were just chillin on the couch. This wasnt some kind of roughhousing that we did sometimes and made sense it was just very out of left. No fighting, no trigger at all, and she wasn't angry. She was actually laughing her creepy head off and kept trying to do it. Another time I did get into a little argument with her in her car. I decided to get out and go back to her place for my stuff because we weren't very far yet. When I got there she'd beaten me there. I said Im just looking for my phone and then I'm gonna leave. When I couldnt find it, I picked up her phone to call mine and goes NO! DON'T! So i did, and my phone rang from way up on top of her desk/ cabinetry thing. Fucking weird. And then other moments I just cant even explain. Ive often wondered what her path of destruction has been like.