I looked again, and indeed, he was who he said he was. A good friend I haven't seen in about 14 years, from high school. The member of our inner circle who lost contact most quickly after we went our separate ways. The cool one. You know the one.
Anyway, I yelled my email address across the room and got swept back up in the crowd. Luckily the email address is (hopefully) easy to remember... Should be hearing from him any time now.
Such a small, small small world.