Breakaway
Breakaway , noun
[Break + away]
1.
A wild rush of sheep, cattle, horses, or camels (especially at the smell or the sight of water); a stampede. [Australasia]
2.
An animal that breaks away from a herd.
3.
an object designed to break off or shatter under impact, as a safety measure.
4.
(Sport) the sudden emergence of one or more players or contestants from a clustered group, rushing toward a goal, as bicyclists in a race, or basketball players after a rebound has been caught.