The general feeling of weightlesness after driving over a slope. I know it isn't the topic of the post. I know this area. I was talking about 32ft/sec^2 velocity as in free fall and the feeling you get without gravity. I didn't think it was rare. Or my non-specific language to blame here?
I can do dv/dt and derive acceleration also.
Now we are going into a place I don't have time to explain tonight.