Something else to lose sleep over: Consciousness could last hours after 'death'

[canetoad]

39. I saw Charlotte Corday mentioned above

There's been several informal experiments conducted to ascertain consciousness after guillotining. Amazingly, a fairly recent study was undertaken here.

https://pmc.ncbi.nlm.nih.gov/articles/PMC9930870/
"The Most Gentle of Lethal Methods": The Question of Retained Consciousness Following Decapitation

Abstract

Since the development of the infamous guillotine in the French Revolution, physicians have debated how long consciousness persists in decapitated heads. Fueled by anecdotes of severed heads that blink, blush, and appear to retain intelligence, numerous experiments have investigated this macabre subject for nearly 250 years. In this paper, we examine the evidence, both historical and modern, and ultimately conclude that, while the truth may never be fully known, all evidence appears to indicate that loss of consciousness appears to occur within seconds of decapitation. The rumors that circulated through the European consciousness during the Terror of the French Revolution appear to be just that - curious urban legends from an awed and terrified public.