June 2012 stories at FCP

http://www.flyingcircusofphysics.com/

The June 2012 stories at the main FCP site: (1) Why are widgets required in cans and bottles of Guinness stout? When poured, why do bubbles in the stout descend? (2) When you clap near a long pipe, why does the echo "zing"? (3) Why do birds fly in a V formation? (4) What do bees see in Van Gogh's painting The Sunflowers? (5) Pub trick: getting a coin through a small opening.