No, Jeremy whatever's idea was becoming stationary.
I'm pointing out that staying stationary can kill you as well.
Imagine you're on a rocket, which launches at 99% the speed of light. Your body's attempt to stay stationary, via inertia, is what kills you.
It's the opposite of what kills you when you come to a sudden halt--that's your body's attempt to keep moving, via inertia, but something being in the way. (Becoming stationary.)
In other words, it's the change of state from whatever you're at.
Whether it's staying or becoming, either way will kill you. Jeremy only mentioned the one, and said it as an absolute, like that was the only thing.
It's fine, he was doing it to make a joke, I was just pointing out the inaccuracies. Stuff's even funnier when it's true, but that unfortunately isn't fully true, it has other instances/exceptions.