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That's actually incredible. I've never made it beyond 2 mins.

I'd answer this comment but I just died of asphyxiation.

I think it's a fitness related thing. I just looked it up and the averages are 3-5 minutes depending on how the body uses oxygen. A super fit person will use less I think, due to their conditioning. That's what Google reckons anyway.

I'd answer this comment but I just died of asphyxiation.

Flew too close to the sun.

Yeah, fitness would explain, like, a lot here.

I didn't think I'd last two, let alone three, minutes and I wasn't in a good way when I was done...so won't be holding my breath again anytime soon.