The strangest one I had was at a Backpackers hotel in Athens. I saw a woman from behind and thought that looks like my next door neighbour Helen Jameson. Then I thought I don't even like Helen let alone know what she looks like from behind. but yes, waited, and it was Helen so we chatted for a while. Then I went to the dorm room and thought I better introduce myself to the chick in the top bunk of the bed I'd be sleeping in. So the very next person I spoke to was my neighbour over the back fence