Hey, shut up. You don't know that. Someday I might be able to-- and you're gonna eat those words!

[ Jean doesn't normally insist he'll be able to fly with his buttwings, but when he does, it's to prove people wrong. ]

I think it was like... a year a go? A little more? Point is nobody ever taught him how to fly. Plus he's like, metal. He 'glides' like a brick with wings.