[rossant]

> Probably died instantly, given the neurological "fencing" response (suggests spinal cord was hit—never mind the artery, he was already dead).

Could you expand on this? What does neurological "fencing" response mean, and what in the video indicates this is it?

[perihelions]

It's a neurological sign associated with traumatic brain injury. That unnatural reflex of the arms you can see in that video.

https://en.wikipedia.org/wiki/Fencing_response ("Fencing response")

[rossant]

Thank you. So haunting.

[perihelions]

It's useful to recognize that pose! It's often people who could benefit from quick medical attention, if someone notices the symptom.

[corey_moncure]

Decorticate posturing of the hands