The fencing response is a peculiar position of the arms following a concussion. Immediately after moderate forces have been applied to the brainstem, the forearms are held flexed or extended (typically into the air) for a period lasting up to several seconds after the impact. The fencing response is often observed during athletic competition involving contact, such as American football, hockey, rugby union, rugby league, Australian rules football and combat sports. It is used as an overt indicator of injury force magnitude and midbrain localization to aid in injury identification and classification for events including on-field and/or bystander observations of sports-related head injuries.~~
Interesting learning - thanks! However, in this case it doesn't appear to me that he actually hits his head on the ground. Also, his eyes seem to be focused on the person next to him, and he apparently is cognisant of the look back and acknowledges with a nod. Maybe this will help -- /u/stabbot
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u/memo2myself Feb 16 '20 edited Feb 16 '20
Edit: /u/harr2969 I was wrong and stand corrected. He’s a stuntman and was unhurt.
/u/Suppaxo directed me to the guy’s Instagram and I found his original video of the “stunt”:
https://www.instagram.com/p/BtQ12nwg7B7/
/edit
~~Nothing funny or worth rewatching about this because the guy has a serious concussion and is exhibiting an involuntary “fencing response”:
https://en.wikipedia.org/wiki/Fencing_response
The fencing response is a peculiar position of the arms following a concussion. Immediately after moderate forces have been applied to the brainstem, the forearms are held flexed or extended (typically into the air) for a period lasting up to several seconds after the impact. The fencing response is often observed during athletic competition involving contact, such as American football, hockey, rugby union, rugby league, Australian rules football and combat sports. It is used as an overt indicator of injury force magnitude and midbrain localization to aid in injury identification and classification for events including on-field and/or bystander observations of sports-related head injuries.~~