RottenTomatoes Score: 0% The Plot: The seemingly idyllic life of dentist Dr. Alan Feinstone (Corbin Bernsen) is shattered when he finds his wife cheating on him and embarks on a murderous rampage. Why It Sucks: Do you really need to know anymore when the film in question is called "The Dentist"? This isn't just a B-movie: it's a Z-movie that goes the admittedly original route of oral destruction, but suffers from a wildly cliched plot and hilariously awful acting. Thankfully for Mark Ruffalo, he only appears in a brief supporting role as a sleazebag who hits on a young woman in the dentist's waiting room and punches Feinstone for interfering inappropriately with his client, but for those who want to see a young Ruffalo slumming it in an early role, it does pretty much provide the movie's sole source of entertainment. Which of these embarrassing Avengers-starring movies have you seen? Shout it out in the comments!