Mid-flight, of course! As a proper gentleman, Shepard has surely learned the secret of flying from Arthur Dent (from The Hitchhiker's Guide To The Galaxy, it consists of avoiding the ground, with style).
I wonder what he makes Gardner serve at the canteen...
(I can see Garrus poking a kidney pie with a fork, wearing a vaguely nauseated expression, Mordin scrutinising a Yorkshire pudding, mentally running through the definitions of "pudding" to see what category it fits in...)
You *know* you want to draw Lady Shepard... ;D