So not too long ago while on AIM I got a text from a familiar screen name, yet it wasn't on my buddy list and I couldn't recall who it could be talking with me as if they knew me, but of course they did as they asked if I was still working my current job and such. So after some awkward minutes of casual conversation and trying to not reveal I had no idea who they were let alone where I knew them from they had to leave. The whole time I was just thinking of Seinfeld quips to use as I know there's been this situation in that series at least once.
So have you ever had someone who you apparently knew yet couldn't remember for the life of you suddenly come out of no where and begin talking with you and just carry on as if you remembered them?