I've had 4 spinal surgeries, two of them when I was still playing ball and I know exactly what you mean.
But I also know exactly what that spasm looks like on a ball field; and it don't look like that.
When those buckle you, you head straight for the ground as fast as you can get there; you don't try to keep standing and fail.
That boy's brain bounced of the back of his skull and I bet my house he's got a hell of a headache right this minute.
I never even thought about it like that.
That's hideously funny.