Stabbing sensations of loss and/or regret so great within ones being they may crumble into nothing at any given moment for no apparent reason. Ones life may be perfectly composed and executed from the eyes of the world, meanwhile said individual is gasping for a sense of comfort that no human power is capable of providing.
Mother has infant child ripped from her arms by a giant bird of prey and watches it tear the body apart for the birds young nestlings. This would be considered level 10 pain felt by the mother. There are also may other applications for this term only to be prescribed by its user.