Reflections on: being "old"

Recently, after a jr. high small group I was caught off guard by this conversation...

teen #1 to teen #2 - Do you think Mike knows about Monty Python?
teen #2 response - Probably, but you can ask him.
teen #1 to me - Hey, Mike have you ever heard of Monty Python and the Holy Grail?
me - Do you know how old that movie is?
teen #1 - no
me - I bet I saw that movie before you were even born. What year were you born?
teen #1 - 1994
me - Yeah, I think I saw that before you were born.

me (afterthought) - does that make me old?

One moment you forget how many years there are between you and the students. The next moment you are reminded that there are plenty of years between you and the students. And I'm not even that old, just shy of 30. What will it be like in the next few years? Will the students remember the Smurfs? Will they know about baseball before there was a "central" division?
Will they know about the original Super Mario Bros.?

Have you had one of those "old moments" recently?