Rarely attempted on jet aircraft, this feat was first achieved by the Pakistan Air Force flying U.S.-made F-86 Sabres in February 1958.
It is considered a difficult formation as the aircraft have to fly very close to one another to create the desired effect.
The larger the number of aircraft involved, the higher the risk, as compared to other formations.
[1] Thessalian cavalry was especially famous for the formation since it could change direction quickly.
A formation in association football where the four midfield players are positioned in the shape of a diamond.