A term that is sometimes used for oceanic crust rocks is sima, which is short for magnesium silicate, a common component of these rocks. Another term for these undersea igneous rocks is mafic, which comes from the fact that they are high in magnesium and iron. Basalt and gabbro are examples of mafic rocks.
The current record is held by Briton Corporal of Horse (CoH) Craig Harrison, of the UKâs Household Cavalry, who recorded a 2,475 m (2,707 yd) shot (confirmed by GPS) in November 2009, also during the War in Afghanistan, in which he hit two Taliban insurgents consecutively.
There is a claim that the current world record for the longest human cannonball flight is 193 ft 8.8 in (59.05 m), established by David Smith Jr. on the set of Lo Show Dei Record, in Milan, Italy, on March 10, 2011. The distance was measured from the mouth of the cannon to the furthest point reached on the net.