Conscription is a lot like slavery. You are plucked from your home, sent to places you don't want to go to, told to obey without question, including doing things that may go against your moral code. Refusal to obey can result in incarceration or, (like WWI deserters) even death.
The difference between the two tones is too great to be of much use. I can't imagine very many people getting it wrong. (I ran subjective speech quality experiments for many years, and you really need to measure much more subtle differences.) My pitch differentiation is poor (telling if a guitar is in tune, for instance), yet I got 100%.
The guy up top is sorting the recyclables. Couple of years ago when we were there, they would dump the bags of garbage on the street, sort the recyclables, and shovel the garbage onto the truck. Wish I had a video.
So much wrong with the experiment, a sample of one being the first. And you're telling me you can drive further, take more time, and use 2/3 the amount of fuel? (1:52, and 3% is wrong) People confuse Mythbusters with science.
Incredibly well filmed. I hope other photographers are paying attention. Correct orientation, steady camera, and not even a single dumb comment in the whole video.
http://www.bbc.co.uk/news/magazine-24903034
https://www.youtube.com/watch?v=0e01yNFZY4U