I’d likely go for guillotine. Brain can’t operate without blood and if you sever all the arteries/veins at once it’s immediate lights out when that pressure drops. Internal decapitation from a noose isn’t too bad either though, but neurogenic shock likely takes a noticeable amount of time compared to just completely dropping blood pressure entirely. Not that you’d remember it.
I’d likely go for guillotine. Brain can’t operate without blood and if you sever all the arteries/veins at once it’s immediate lights out when that pressure drops. Internal decapitation from a noose isn’t too bad either though, but neurogenic shock likely takes a noticeable amount of time compared to just completely dropping blood pressure entirely. Not that you’d remember it.
Testing from the days of guillotines seems to suggest you could be conscious for up to 30 seconds after getting your head removed