He said if every atom in your body were accelerated that fast at the same time. So he is right. But practically no. Top fuel Drag racers for example, experience 5G's of deacceleration. Their retinas detach from their eyes after repeated races.
Also TIME DOES play a huge role. I learned that when I read this:
You can take 200G's of force to your head for a very very small amount of time.
As noted earlier soft things like balls extend the time of impact. Hard things don't. I think I could use derivatives to explain this. I think I'll ponder this over.