Everyone is entitled to be stupid, but some abuse the privilege

ok i was in walmart this guy walked up to me and said whats up john
he said its been so long time sence we have seen one another he talked about the old days when we were in school
he knew so much about me
i just smiled and acted like i knew what the hell he was talking about
but i had no idea who the hell this guy was and still dont and its been on mind
and i can not for the life of remember this guy
i know would had been best if i would have just said i dont remember you but i didnt want to seem rude
but i guess i will just put him down as the stranger i know