On: How hard was Felipe Massa hit, exactly?

[d0mine]

acceleration does not kill either, it's variance inside the body that does (a free fall in a strong but relatively uniform gravitational field does no harm e.g., a cosmonaut on the international space station).

[tome → d0mine]

Yes, uniform acceleration under gravity is equivalent to remaining still!

http://en.wikipedia.org/wiki/Universality_of_free_fall#The_E...