What does it sound like to have a large room of people crack their knuckles at the same time?

Adam Rifkin stashed this in Science!

<p><a rel="nofollow" target="_blank" href="http://youtu.be/AdCZ3vPPrdo"><iframe height="315" width="560" src="http://www.youtube.com/embed/AdCZ3vPPrdo"></iframe></a></p>

Adam Rifkin
2:59 PM Jul 23 2014

Like a giant breaking a twig:

400 Reddit comments: http://reddit.com/r/videos/comments/...

<p>Like a giant breaking a twig:</p> <p><a rel="nofollow" target="_blank" href="https://www.youtube.com/watch?v=X2ab0qfPtKI"><iframe height="315" width="560" src="http://www.youtube.com/embed/X2ab0qfPtKI"></iframe></a></p> <p>400 Reddit comments: <a rel="nofollow" target="_blank" href="http://www.reddit.com/r/videos/comments/2bhesn/what_does_it_sound_like_to_have_a_large_room_of/">http://reddit.com/r/videos/comments/...</a></p>

Adam Rifkin
3:00 PM Jul 23 2014