What if one of the world's greatest violin virtuosos played for spare change?

Pearls Before Breakfast - washingtonpost.com

In a social experiment, one of the world's greatest violinists, Joshua Bell, played his multimillion-dollar Stradivarius, incognito, outside a busy subway stop in Washington DC during the morning rush. Would people notice his virtuosic performances? Would they crowd around and cause a scene? Would he make any money as a busker?

The Washington Post had the original idea for this experiment. This fascinating article features some hidden-video footage and answers some questions, but poses even more about why people reacted to the Josh Bell's performance the way that they did.