This is part 19 in IGN's walkthrough for the story missions of Far Cry 3.**SPOILERS BELOW**After retrieving the ancient knife, Jason heads to Buck's hut to exchange it for his friend, Kieth. Buck, however, double-crosses Brody; intending to keep both he and Keith for his own personal ... pleasure. Gross.He attacks, and he and Jason battle over the knife. After a series of QTE's (Quick Time Events), Jason is victorious.