Yep, this happens any time I travel in a car. Once the motion stops, when I get out I still feel like I'm moving. I also feel this sensation after being in a pool. Once I get out, I still feel like I'm bobbing. Elevators cause it, too. Even going up or down a few floors, when I exit the elevator, it still feels like I'm moving. I also get dizzy when my hair stylist lets the chair down too quickly or if my dentist leans me back too far in the dental chair. I am a mess of instability. But guess what. I do not have a brain tumor and I had the tests to prove it. It's benign positional vertigo and pretty manageable.