Usually something reminds me of a mistake I have made or at least think I have made. Usually where I think I have said or done something that wounded someone (not physically just to be clear) but psychologically for sure. That starts me ruminating on how there’s no way to fix it and that person probably hates me, and everyone would hate me if they only knew about the terrible thing. I wish I could rewind time and never do the thing but that is useless etc etc.