Rebreathing your own air

[lowesthangers]

would pay to see him do that with good strong cigarette smoke. SO hot.

[NitrousBreather]

This is Awesome!!

[Robh1966]

I'm quite surprised that your heart rate remained at 80bpm, even as the amount of breathable oxygen got seriously low.

[westernplumber]

@Robh1966

This happens with freedivers. the heartrate either stays normal or goes lower when breath holding until O2 levels are restored at the surface.

[underhtoo]

Have you ever gone so far as to pass out?

[underhtoo]

Really hot

[GXP2008]

Would love to see this with the microphone over your heart instead of EKG. =)