Not about going somewhere and wondering why you're there, but I am reminded of a phone call from my DS about half an hour ago. Conversation went something like this:
DS: Mum, when I rang you yesterday, what were we talking about?
Me: Erm... can't remember, sorry.
DS: (Laughing) Neither can I - I've been racking my brains and can't remember at all.
Me: I don't even remember you ringing me. Oh God, this is bad!
DS: Oh, erm... well I had a missed call from you, so I rang you back. I know I tried a couple of times to get you.
Me: A missed call? I don't remember ringing you! I'm sure I didn't mean to, haha!
DS: Haha, well I know I tried to ring you back more than once...
Me: And did you get through to me in the end?
DS: (more laughter) I'm actually beginning to think I didn't.
Me: So we may or may not have talked yesterday and if we did, neither of us can remember what it was about. Maybe we should stick to texting in future so we have a record
DS is in his mid 40's so it's not just the more mature amongst us