Haven't seen this one here yet.. this kind of thing just amazes me. <object width="560" height="315"><param name="movie" value="http://www.youtube.com/v/dnDeo0yhIws?version=3&hl=en_US"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/dnDeo0yhIws?version=3&hl=en_US" type="application/x-shockwave-flash" width="560" height="315" allowscriptaccess="always" allowfullscreen="true"></embed></object>
Yeah, you need to watch it to the end. At the end she takes the feather off and the entire structure falls down. That sealed it. Meaning the entire structure she build needs the weight of a feather to keep it balanced. There has to be a trick to this, but it was amazing.
I was checking to see if she gently took off the feather (to really prove that the feather was keeping the whole thing in balance), or whether she did so in a strong, swift motion. And looks like she did it quickly and with a little force, so I can see how that would knock down the rest of the structure. Still, impressive.