Exercise ball balls have been jumped across at 8.31 seconds.The record for the farthest jump between two Swiss balls was also made by Neil at a distance of 2.3 meters in 2012 A primary benefit of exercising with an exercise ball as opposed to exercising directly on a hard flat surface is that the body responds to the instability of the ball to remain balanced, engaging many more muscles. Those muscles become stronger over time to keep balance. Most frequently, the core body muscles — the abdominal muscles and back muscles — are the focus of exercise ball fitness programs. A major
Crystal ball ball that is brought into full sunlight. The image of the sun formed by a large crystal ball will burn a hand that is holding it, and can ignite dark-coloured flammable material placed near it. Ball lenses such as are used to couple fiber optics are identical to crystal balls, but in tiny form, commonly 1mm to 10mm in diameter. A crystal ball lies in the Sceptre of Scotland that is said to have been originally possessed by pagan druids. Philadelphia's University of Pennsylvania Museum of Archaeology and Anthropology (also called "Penn Museum" for short) displays the third largest crystal