The Hundredth and Third Post of a Lifetime

I'd like to share a conversation I had with my brother (Jonathan a.k.a Jon) over dinner yesterday.

Mom: What do you want to do when you grow up?
Me: I dunno. I'm scared because I don't think I'm smart enough.
Mom: What nonsense. Jon, do you think your sister is smart?
(He pauses and eats while he thinks.)
Jon: Well, seeing as how much training she does and little time, yeah I think she's pretty smart with the grades she has now.
Mom: See?
Me: Mumblemumble.
Mom: Can you help me facilitate for a camp, Jon?
Jon: I don't think so. I have my exams coming up.
Mom: When?
Jon: the 26th or 27th of June I think.
Mom: The camp is one week earlier come on! It's only 2 days.
Jon: No! It's very important! I have to study because I need the marks to get into Cambridge.
(Until this part, I was bored until I heard the Word.)
Me: CAMBRIDGE?! You're going to Cambridge?!
Jon: Yeah. to study astrologeology.
Me: What's astrology?
Jon: ASTROLOGEOLOGY. The studying of rocks.
Me: Like meteorites?
Jon: Hmmm something like that.
Mom: Then where are you going to go to work on that?
Jon: NASA I guess.
(I nearly choked on my food.)
Me: $%$&*%$@* NASA!? Are you crazy! Only the best go there!!!
And he just grinned. He GRINNED.
I guess you know what the grin meant.
Man, my bro has a lot of confidence. I wish I was like him : /