Showing a previously uncontacted tribe's first contact with an outsider in 1976. It's 15 mins long but totally worth it if you can be bothered. The reaction to seeing a mirror for the first time (from about 6.54) is quite amazing.

This one goes out to untrue

http://andrewsullivan.thedailybeast.com/2011/06/would-we-want-to-be-contacted.html