With the help of 70 people from around the world we got the radius of the Earth. There was a better turnout than I could have hoped for. Sorry for the delay, it took a while to edit this one together.
The first video:
http://www.youtube.com/watch?v=BJYjvt8dOFs
Check out thunderf00t's channel for some other good science education videos:
www.youtube.com/user/Thunderf00t
