The gesture still jostles Jim in his seat and he nearly spills the drink in his hand though he hasn't stopped laughing. The booze saved, Jim shifts to pull himself (mostly) upright again.

"Math and thrusters s'all you need. Maybe a little luck." Or a lot of luck, in Jim's case. But mentioning Khan is a good way to ruin any happy story. Besides, this talk of a magic hammer is all new. And exciting! Obviously it's magic if it grants it's owner flight but...

"Wait, wait. Issat flight or momentum? How heavy is it? How d'you not pull your arm outta socket?"