Why Tim decided that it was last time he’d ever introduce a hybrid human-Kryptonian friend to his brothers…

Conner: You’re mocking me, aren’t you?

Jason: Oh no, no no no, no…

Damian: *suddenly points behind Conner*

Damian: SUPERBOY, LOOK! AN ALIEN!

Conner: *looks* Where?

Jason and Damian: *keel over laughing*