[00:00] And how much have you had to drink today? - Can I have you step out of the vehicle? - No, that's impossible. [00:16] You see, once your eyes are closed, your brain just kind of guesses where things are. - And since our bodies aren't perfectly symmetric, those tiny imbalances send you off track real fast. [00:28] I challenged 5 people to walk across this field while blindfolded, and as you can see here, Because without your eyes you're breaking this constant feedback loop that's happening between [00:40] your brain and what you're seeing around you, helping to readjust your foot placement whenever And similar to using this patch of cement as a guide to walk on, our brain uses things like buildings, trees, and even the horizon to help us keep our bearings. [00:57] - That was weird.