At the time I had posted this, I'd just discovered this, on my way out the door to work.
Tested it this morning; though you can see the floor and everything inside, invisible barrier keeps you out. Boo.
(You can, however, shoot in to the floor with the hover bike. But, there's no destructable objects inside; I tried shooting at some of the planters against the wall, but they seem to be solid objects.)
From one thing, know ten-thousand things.
--Miyamoto Mushashi, A Book of Five Rings