Here are the May stories at the Flying Circus of Physics main site:

1. the physics of a tae-kwon-do punch, as shown here in my photo of Patrick Walker

2. color-shifting paints on cars and inks on currency --- flashy iridescence

3. the lightning displays in the ash spewed out by the recent volcano activity in Iceland

4. pub trick of the month --- moving a ball from one beer mat to another one, using only a wine glass

5. article of the month --- from August 1988, my article about the physics you can do and see during a long airplane trip. For all these, come to www.flyingcircusofphysics.com

Also, I invite you to the new Facebook site for FCP:

http://www.facebook.com/pages/Cleveland-OH/Flying-Circus-of-Physics/339329532602?v=wall&ref=ts

videos, photos, games, and calculations about FCP topics