MTV just posted this exclusive clip: Head Count, from Marvel's The Avengers, where "Loki (Tom Hiddleston) and Tony Stark (Robert Downey Jr.) do the math on their impending showdown." Get More: Movie Trailers, Movies Blog   What did you think? I don't know about you, but we sure can't wait to see this one! Marvel's The Avengers hits theaters May 4th and don't … [Read more...]