Those are just the muscle spasms that sometimes occur with the bodies of the newly deceased. The subject of mechanical decapitation would loose consciousness within the first few seconds due to the massive loss of blood and actual brain death would occur with 15-30 seconds. I regard this as infinitely preferable to a method of execution that routinely takes 10-15 minutes and has on occasion taken over an hour.
I love how some people can just imagine OTHER RESULTS than what is clearly explained.
Google it for yourself. There are documented cases of a severed head opening its eves and looking at people who called its name. That sounds like more than ‘muscle spasms’
“would loose consciousness “
Psst...”lose consciousness “