I have a tendency to think about something someone did that bothered me, and then I have a full conversation in my head where I try to talk to them about it, and a big fight usually happens where I get really mad and rant to them about all the things they do that bother me, and I actually get mad at them even though they aren't there. Then I see the person later and we actually talk and it turns out that I blew the whole thing out of proportion in my head.