From episode 18, Kitty is stuck babysitting Tildie when the MRD shows up, and we get this gem as Kitty's trying to keep Tildie calm:
"Trust me, everything's going to be alright, there's no need to go and create a big hundred-foot-tall monster that's gonna step on the mansion! You stay here with the professor and I'll go get us some chips, a couple of sodas and maybe a board game! Everything's going to be fine! Okay?"
Idie and Quention's interaction in #5:
Quentin: Hi there. Idie, is it?
Idie: If you want to be my boyfriend, Quentin Quire, just know up front that I am not interested in having very many children. Five ought to be plenty.
Quentin: On second thought...
At the graduation ceremony, this little exchange between Fantomex and Abigail Brand.
Fantomex: Apologies, but... your child appears to be a flesh-eating alien.
Abigail: And yours appears to be Apocalypse.
Fantomex: Touche. Perhaps you'd like to join me for dinner sometime to... swap parenting advice?
Abigail: Perhaps you'd like to get deported to Mars.
The first TPB features the school's class list as bonus material, with one class being "Ethics 101: Forgetting Everything You Ever Learned From Emma Frost, with Headmistress Pryde". It's even funnier if you remember that in an issue of Astonishing X-Men, back in 2004, Kitty was surprised to hear that Emma taught ethics. Other classes include "World History (1880 - 1950): An Eyewitness Account, with Headmaster Logan" and "Algebra Sucks: I Know, But You Still Have To Learn It, with Professor Bobby Drake."