In Star Trek Insurrection we see Captain Picard and Worf spinning upside down repeatedly while flying in an atmosphere in a shuttle and trying to capture Data.
After they even out, Worf gets up and walks to the back of the ship, having been unrestrained.
Why didn't they fall out of their seats while they were upside down? Do starfleet ships use artificial gravity even while they're in atmosphere? If this is true, is there an explanation as to how this doesn't have double the effect when they've leveled out?
Maybe this has something to do with the inertial dampeners? I'm looking for an in universe explanation, hopefully someone with one of the official guides can answer.