Aut cum scuto aut in scuto
Get your point, but, if an AFV has been working recently (find one, then get down on your belly and have a look; assuming that it will not be polite and roll over for you like this one did) and have a look. The bottom side is the part that is usually polished nice and brightly clean...Of course, if you leave it sit for a moment, the rust starts.
Those hotrodders! They should've got a roll bar fitted before doing stunts!
and the crew is being patch up at the field hospital. After bouncing around inside off sharp, heavy objects.