There's a reason you didn't stay in touch with all your classmates.
1. The dude that's moderately successful and needs to rub it in everyone's face now.This guy makes a point to bring up his 401(k) and dropping thousands of dollars on his vacation. You get the feeling he's not so much "well off" as he is "in debt," but you're too polite to say anything.
2. That friend you thought was going to be a rocket scientist but is now a waitress.You're surprised to find out that genius friend of yours you lost touch with isn't running her own company. Awkward small talk ensues after you walk up to her and open with, "Heyyy, so are you a billionaire yet?" and find out she's working way, way, way below her potential.
3. The couple that is way too into being a mom and dad.What have they been up to the last 10 years? Just having kids. Taking pictures of kids. Talking about their kids. Looking at their kids. Are you going to have kids soon? Their kids and your imaginary future kids could have play dates.
4. Your old friend who has a job so cool that you're now rethinking all your life choices.One of your old classmates is making six figures a year as a DJ/snowboarder/actress and constantly going to Ibiza and movie premieres, and you remember when she was known as "the girl who ate paste." You wonder what you did wrong in your life tonotget that life.
5. That guy who used to be known for jumping off the roof and setting fires in class who's now an accountant.This guy used to drop acid during school hours. Now he's wearing a brown suit and mustard-colored shirt to the reunion and you're trying to talk about the good old days and he's just like, "Have you thought about getting someone to file your taxes this year?" This guy apparently fit his entire allotment of fun into junior and senior years of high school.
6. The alcoholic.This person somehow got ahold of a bunch of drink tokens and now they're slurring their words and telling you about their life plans and you're just like, "…."
7. The familiar face whose name you can't remember.You've just spent an hour reminiscing about all the good times the two of you used to have. They've said your name four times. You don't remember these good times or their names, and no one is coming over to bail you out.
8. The person it takes you way too long to realize is there with their same-sex partner.For some reason, you didn't pick up on the signals, and now you're kicking yourself after having said, "So you two are really good friends, huh?"
9. The classmate who is trying to get you to buy in to their pyramid scheme."You gotta get on board with this. We're making money hand over fist." "Have you made money?" "Well, no, not yet, but … you gotta give it time."
10. The teacher who might be hitting on you.Why are they here? Are they being friendly? Were they always this creepy and you just never realized?
11. Your actual friends who you've stayed in touch with.This is your refuge of normalcy during this night. They're there for you after the small talk gets too awkward.
12. John Cusack inGrosse Point Blank.Unless you actually went to school with John Cusack, this isn't literal, but there's always that one person who disappeared for years and no one knows what they've been up to. Everyone is too scared to ask.

Yels

Nice one OP

But these points are so not Nigerian.

So true... Life's like that! Got me smiling and thinking same time.

U 4got
d thief, who is now a pastor.
D born again girl whos now a runs girl.
D class dummy whos now riding in a buggaty, nd d class genius trekking.
The teacher who will never stop being a teacher.
The class rep, who is still search 4 admission.
The runs girl who is now in her 3rd marriage, with 8 kid.
The class musician whos now selling weed up nd down.
Etc.
I belong 2 d set of the runs guy who will never stop being a runs guy.

chinex276: U 4got
d thief, who is now a pastor.
D born again girl whos now a runs girl.
D class dummy whos now riding in a buggaty, nd d class genius trekking.
The teacher who will never stop being a teacher.
The class rep, who is still search 4 admission.
The runs girl who is now in her 3rd marriage, with 8 kid.
The class musician whos now selling weed up nd down.
Etc.
I belong 2 d set of the runs guy who will never stop being a runs guy.

This is more like it.

And I hope you outgrow your 'runs guy' status btw.