What was done in "Bigeard's shrimp" or (crevettes Bigeard) torture method?

Death flights (Spanish: vuelos de la muerte) are a form of extrajudicial killing in which the victims are dropped to their death from airplanes or helicopters into oceans, large rivers or even mountains. Death flights have been carried out in a number of internal conflicts, including by France during the 1947 Malagasy Uprising and the 1957 Battle of Algiers.

Death flights were used during the Algerian War by French paratroopers of the 10th Parachute Division under Jacques Massu during the Battle of Algiers (1957). After it was discovered that corpses sometimes resurfaced after being disposed in this manner, the executioners began attaching concrete blocks to their victims' feet. These victims came to be known as "Bigeard's shrimp" (crevettes Bigeard), after one of the paratrooper commanders, Marcel Bigeard.

Marcel Bigeard (February 14, 1916 – June 18, 2010), personal radio call-sign "Bruno", was a French military officer and politician who fought in World War II, the First Indochina War and the Algerian War.

He was one of the most decorated soldiers in France, and is particularly noteworthy because of his rise from being a regular soldier in 1936 to ultimately concluding his career in 1976 as a Lieutenant General and serving in the government of Valéry Giscard d'Estaing.