When people telling a story get hung up on details that would never matter to the listener

Examples:

So the other night I went out with Sarah and her friend, Sally…wait no — Sandy, wait. Was her name Sally? I think maybe it was..well actually, maybe it was Susie. Anyway so I met up with Sarah and her friend Susie at X bar and it was crazy because — wait her name is SALLY…anyway so

You’re gonna go to London? Awesome! I went there in 2018! Wait actually I was there before I met Sarah. Or maybe right after. Let me ask her. Actually no, I know it was before we met. And we met in 2017. So that means I must have gone in 2016. Yeah I remember now, June of 2016.