You might find this mobidly interesting... http://www.strangehistory.net/2011/02/06/lavoisier-blinks/

Debunked here:

As for the story of the postmortem experiment with Lagrange, no mention is made of it in any of the reputable biographies of Lavoisier. ...

https://pubs.acs.org/doi/abs/10.1021/ed081p629

Oh wow. That really is dark and fascinating, thanks!

I know what this is, and I'm not clicking it.

There's no graphic images. It's not a "shock" or "gotcha" link.

The TL;DR is that the head can stay "alive" for some time after decapitation. The nominal example (see the URL) being Antoine-Laurent de Lavoisier who was guillotined during the French Revolution and committed to blinking for as long as he possibly could after being decapitated. There are also more modern examples "thanks" to ISIS.

Oh I didn't think you were trying to trick me or anything. I read about Lavoiser and the guillotine when I was a child and it stuck with me.

The Russian experiment with the reanimated dogs heads... I'll let you google that one yourself.