Do you want to know what it's like for a human being to live in a cave for 40 days, isolated from the world, with no time reference points and no outside contact?
To find out about the results of this extraordinary scientific experiment, which 14 volunteers went through, I recommend that you watch the ARTE documentary DEEP TIME une expérience hors du temps, for which I also narrated the story, immersed in a speak booth for 2? hours with no time to spare.
By the way, maybe you too will never see your watch the same way again ;-)