As Ramadan begins, more than 100 hunger-strikers in Guantánamo Bay continue their protest. More than 40 of them are being force-fed. A leaked document sets out the military instructions, or standard operating procedure, for force-feeding detainees. In this four-minute film made by Human Rights organization Reprieve and Bafta award-winning director Asif Kapadia, US actor and rapper Yasiin Bey (formerly known as Mos Def), experiences the procedure:
  
UPDATE:

Today I came across another video, a response to the one above, which aims to show that being force fed through the nose is no big deal.  The least I can do is to also post it here and hope that somebody will clarify the apparent contradiction between the two videos:

The Saker