This one caused a _lot_ of controversy in the FPV (first person view/video) RC community a while back:

https://www.youtube.com/watch?v=M9cSxEqKQ78

if you don't have the time/patience to watch the whole 3-ish minutes, try this but:

http://youtu.be/M9cSxEqKQ78?t=2m2s