“Harvest Lake” (*1/2 out of four) was a bizarre and boring amateur-hour horror show about five friends who vacation at a lake and fall under a sinister and libidinous presence that turns their friendship and their sanity inside out. More hardcore in terms of sex and nudity than most movies of this caliber but otherwise there’s nothing original to harvest here. “Creepshow 2” told practically the same story in one of its segments in 20 minutes flat.