[Kirkwood]

"No, that would be gravity. Inertia is static, Gravity is dynamic."

You misunderstand inertia. Inertia is when a mass resists changes in velocity (speed and direction). That doesn't mean it is only a static property, nor does it mean that it doesn't come into play in a dynamic system.

[Pukin Dog]

Just to make a long story short, you have to take into account the fact that we are not talking about an object of constant mass. It is the difference in the various masses that caused the problem. i.e., the blood and its relationship to the pilot's brain. That is not a difference of inertia, but a difference in how the two sets of mass were effected by the change in direction. I hope that makes sense, because I have had too much beer tonight to be sure. Check with me in the morning.