31:33 EDS in the general population: As a Narcoleptic, I see it the other way around. Roughly 80% of people are able to stay awake during their activities after sleeping. 😮 It took a very long time to emotionally accept the fact that my sleep regulation is permanently and irreparably damaged, so that my sleep is just a way to disengage from daily struggles, even after a rude awakening due to frequently and very vividly occurring nightmares. It is more like changing internal state than really appreciating it. It is ok. I am deeply grateful for stimulants, even with their side effects.