That being Damian's behavior back when he was first introduced. There he looked to be about 8 yrs old and so it was more acceptable. He's 12 now, making him a kid still. Having crazy engineering skills like making a car FLY, is bit too much for my suspencion of disbelief. Sorry, but I am annoyed by his genius engineering skills. If this is the only thing he's exceptional at, like it being his specialty, I won't mind it (ya know, like an idiot savant or just being an engine geek), but methinks, that's not going to be the case...
AND DAMNIT I WANT TO LIKE DAMIAN! I LOVED the way Fabian Nicieza wrote him, with Tony Daniel's portrayal of him coming in second, but Morrison lays it on a little too thick for my tastes and makes him smart but with no charm whatsoever. D: GUH, I hope someone else gets to write him soon!