Sometimes I get this weird feeling, that might be described as something like vertigo, but maybe not quite, since there's no dizziness involved. I feel like my perspective is all screwy, like I'm a lot farther away from the ground than I am. I can look and see that I'm actually not, but it feels a lot different. I don't get this often.
Sitting in my chair at work just now, I got the feeling that the chair is missing a bar across my lap, like in a ride. Or, almost like I'm in a chair-lift thing, and there definitely should be a bar there, to keep me from falling.
Is this a common thing? Do I have a tumor or something?