Realization #598393 that you're older than you feel:
You go to your high school's website. First, you goggle that they've got a website. Then you happen to read through the faculty list and you realize that one of your high school classmates is now teaching there.
Then it dawns on me that the classmate in question—Joshua Harrison—is one I haven't seen in seven years.
Seven years.
Seven years since I moved away. It seems so quick for me, but I know that everyone else in that class has had the same seven years to move on with their lives, as well. Most of them have probably married, settled into their lives, started having children. Since I have not seen most of those people (all 33 of them) since graduation night, my mental image of them is frozen as they were then.
I have trouble picturing some of them married. As parents. As adults. I have no doubts in my mind that they probably picture me the same way—ugh.