I can only think of this example without sychophantic students.
http://www.youtube.com/watch?v=gEDaCIDvj6I
I also like the yellow bamboo guys.
http://www.yellowbamboo.net/demonstrations.htm
http://skepdic.com/yellowbamboo.html
No need for further comment.
I do think no-touch throws are possible with timing by nage and recognition by uke that not to bail out is a dangerous outcome.