Ok. I'm trying to get this straight in my mind. I am familiar with Einstein's equivalence of acceleration and gravity. But what I am trying to figure out is: who exactly is accelerating? If someone is falling to the earth and I am looking at his pitiful circumstance, he is clearly - according to my observation and calculations - accumulating distance geometrically...and therefore accelerating. Oh, but wait a minute. He feels weightless. According to him - if he hasn't suffered an infarction already - all the subjective signs of one accelerating are missing: he does not feel any force pressing against him (we'll discount the atmosphere). However, I in my stationary position do feel a force against my feet. This leads me to conclude that I am the one accelerating and not him. After all, when I am in a car, I know when I am accelerating when I am pushed back into my seat. Furthermore, the time dilation, the Lorentzian contraction, and all that mess.....does that apply to people in a free fall toward a gravitational body or only to people that are on the ground (or a platform or what have you) and who are feeling the "acceleration" of the ground toward their feet?