The title of this modestly scaled but vivid documentary refers to the chilling sensation Lt. Gen. Roméo Dallaire felt when he met leaders of the Interahamwe militia, who led the butchery of some 800,000 Rwandans in 1994. Commander of the failed U.N. peacekeeping mission to the country—and the loose inspiration for the Nick Nolte character in Hotel Rwanda—Dallaire recalls the Hutu tribal group’s leaders as “the most evil I could ever imagine.” But they weren’t the only devils whose legacy faced the French Canadian officer when he returned to Rwanda last year for the horror’s 10th-anniversary commemoration. There was also the devil of European self-regard, embodied by a Belgian politician who is shown attacking Dallaire for not caring enough about the 10 Belgian soldiers who were killed as nearly a million Rwandans died. And the devil of rationalization, personified by Bill Clinton, who arrives to apologize that he “did not fully appreciate” the slaughter his government did nothing to prevent. A physician from Doctors Without Borders greets Dallaire warmly, informing director Peter Raymont that troops at Hutu checkpoints always yielded to the Canadian’s “booming voice.” Today’s Dallaire doesn’t seem so forceful, however. As he goes “back to hell” for the first time since the massacre, his speech is quavery and his eyes haunted. He admits to frequent depression and to taking (unidentified) medication daily. As the Canadian visits a few survivors and shrines to the many victims, Raymont cuts in footage that shows why Dallaire (and so many others) are still in shock. There’s not a lot of it, but it’s harrowing: Corpses bobble in the tide along some shoreline, and a distant camera captures—remotely but unmistakably—machete blows to human heads, necks, and torsos. Dallaire, not unreasonably, blames the United Nations, the Belgian and French governments, and the Roman Catholic Church. (More than half of Rwandans are Catholic.) While Clinton and other speechifers utter noble-sounding nonsense, the Canadian eyewitness is more to the point: Introduced to a man who lost 14 members of his 16-person family, Dallaire just says, “Shit.”