Rapper Mos Def, who now goes by Yasiin Bey, is protesting the U.S. government's policy of force-feeding Guantanamo Bay prisoners on hunger strikes.
To make his point, he volunteered to be filmed undergoing the standard medical procedure currently being used on 44 detainees who refuse to eat.
The four-and-a-half-minute clip was shot for the UK's The Guardian by the human rights charity Reprieve and BAFTA winner Asif Kapadia.
Mos Def starts out dressed in a dapper black slacks, a collared black shirt, a leather jacket, leather shoes with white laces, and a knit black hat.
He says, "Peace. My name is Yasiin Bey, and I'm here to demonstrate the standard operating procedure for force-feeding detainees at Guantanamo Bay."