Gavinmad
Mr. Poopybutthole
Gee I wonder how I could have arrived at such a thought.
I certainly wouldn't say fencing responses are typical in knock outs. Seen plenty of knock outs in real life and in boxing and MMA. They usually are a sign of a VERY severe concussion. In almost all case that person is going to the hospital and runs the risk of TBI, brain bleeding or swelling which can certainly be life threatening. If someone gets laid out cold they normally would wake back up in a minute or two and not need immediate medical attention. But everyone is entitled to their opinion.

Brain injury forces of moderate magnitude elicit the fencing response - PubMed
Therefore, the fencing response likely indicates neurological disturbance unique from convulsion associated with mechanical forces of moderate magnitude imparted on the midbrain and can assist in guiding medical care after injury.

tonic posturing in 66% of reviewed incidents.
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