balls

In Japan, businesses like banks & convenience stores visibly keep baseball-sized orange orbs behind the counter. These “anticrime color balls” are filled with bright pigment that burst on impact & are for employees to throw at robbers to improve the chance of arrest. – WTF Fun Facts

Source: www.japantimes.co.jp/news/2008/05/20/reference/anti-crime-color-balls/#.V7xAjq6toy4