> > Perfect strangers (or so I think) come up to me in the halls and say "Hi (my name goes here, it's not jimmy and i would like to keep it a mystery for a while)!" and i say, "uh... Johnny!" I said this to 5 people yesterday and they walked away laughing...
>
> There's nothing wrong with you. You're just the victim of a practical joke.
>
> True story:
>
> In college, I thought it would be fun to pass a stranger and say, enthusiastically, "Hey!! How ya doin'? It's been a long time!" Well, once, when I was in a rambunctious enough mood, I did.
>
> And he said, "Yeah, I guess it has, hasn't it?"
>
> It turned out I did, in fact, know the guy, but I didn't have a clue when or where I met him. In the ensuing conversation, I discovered he had been a member of my study group for an introductory psychology course I took my first year.

Chapter One, page one, paragraph one, in "The Practical Joker's Handbook."

"Practical jokes can backfire."
You got off easy.
Howard