**_David Keith in an Indy Jones knockoff_** A rich Caucasian couple vacationing in Borneo (which looks suspiciously like Sri Lanka) hires a famous hunter to take them up a river where dangerous headhunters dwell. Shot in 1987 and released in 1988, “The Further Adventures of Tennessee Buck” is a ‘B’ imitation of “Raiders of the Lost Ark” and “Indiana Jones and the Temple of Doom” along the lines of "King Solomon's Mines" (1985) and "Firewalker.” Regrettably, it’s easily the least of these. It starts off entertaining enough, but the second half devolves into dull activities in the deep jun...