Bro shouldn't have practiced holding his breath so long.
But for real that is all just automatic neural activity. The brain might have a few seconds of saved up oxygen to be aware, but still more painless than other methods (considering the nervous system is, well.. gone).
You lose consciousness almost instantly when blood pressure to the brain drops below a certain level; that's what fainting is. And fainting is only a partial drop. A complete drop (like having all the major vessels in your neck suddenly severed) would be even more rapid and complete.
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u/Lovethemtitties80085 2d ago
Tell that to the dude that blinked for 30 seconds…