This scientist's last experiment involved a guillotine and a friend counting something. What was the scientist's name, the experiment, and how did he come to be able to do the experiment?

I don't know if this is true but here's what I found:
Chemist Antoine Lavoisier was one of France's greatest scientists. He discovered oxygen and helped lay the groundwork for modern chemistry. Then he ran afoul of the French revolutionary government and was sentenced to death. Lavoisier had heard stories of disembodied heads saying prayers, looking around, and otherwise showing signs of life for short periods after decapitation. Ever the scientist, he decided that as his last experiment, he would try to demonstrate whether a head could continue to be alive after beheading, and for how long. He told a friend, "Watch my eyes after the blade comes down. I will continue blinking as long as I retain consciousness." The results of the experiment? Lavoisier blinked for about 15 seconds.

https://cabinetofcuriosities.ca/eye-popping-or-what/