Blanket party
A blanket party is a form of corporal punishment, hazing or retaliation conducted within a peer group, most frequently within the military or military academies. The victim is restrained by having a blanket flung over him and held down, while other members of the group strike the victim repeatedly with improvised flails, most often a sock or bath towel containing something solid, such as a bar of soap.
One victim was eventually diagnosed with PTSD, after being the victim of a blanket party during basic training.''Full Metal Jacket''
The blanket party was popularized by the Stanley Kubrick film Full Metal Jacket. In the film, members of a basic training platoon give a blanket party to an inept member of their platoon, whose mistakes have led to group punishment given to the entire platoon.