Adam is joined by Vsauce's Michael Stevens for a special One Day Build in the cave. Michael has recently taken up playing the Kendama, a Japanese cup and ball toy, and Adam helps make one from scratch that helps optimize his play. This build engrosses both into topics of machining, knot tying, and geometric conundrums. Shot by Gunther Kirsch and Will Nail Edited by Gunther Kirsch Subscribe for more videos! null Follow us on Twitter: http://www.twitter.com/testedcom Get updates on Facebook: http://www.facebook.com/testedcom Tested is: Adam Savage http://www.twitter.com/donttrythis Norman Chan http://www.twitter.com/nchan Simone Giertz http://www.twitter.com/simonegiertz Joey Fameli http://www.twitter.com/joeyfameli Kishore Hari http://www.twitter.com/sciencequiche Frank Ippolito http://www.twitter.com/frankippolito Sean Charlesworth http://www.twitter.com/cworthdynamics Jeremy Williams http://www.twitter.com/jerware Gunther Kirsch Ryan Kiser Thanks for watching! #AdamSavage #VSauce