Firstly, this is NOT a homework question although it may sound like it. My question pertains to http://youtube.com/watch?v=H5NwRfMJgOQ". My question is this: Could an Infrared Laser (there are varying power output lasers of 2W - 20mW) SPIN a paper of say 25 grams as seen in the vid on the tip of a needle/toothpick? I am trying to put forth a plausible scientific mechanism for reproducing this effect. Now I don't know if I'm barking up the right tree so-to-speak but Power=torque x angular speed, so I'm hoping somehow that we can show that such a laser could in theory or in practice push the paper and keep it spinning. What other scientific mechanisms could you suggest that could reproduce this effect? There is obviously the possibility of something hidden in the table with miniscule holes blowing out air but then the (what I believe) trick gets a little too elaborate ie. remote control + tiny air pump etc. Your help is much appreciated.