Cloverfield

The US Government green lights its 'hammer drop' policy that the one army guy alludes to, right before the girl bitten by the monster more or less explodes. Anyway, right after you think the three remaining characters are going to escape to safety in the evacuation helicopter, the monster leaps up and knocks them out of the sky. The three somehow survive the helicopter crashing and end up in Central Park, where Hud, possibly the most annoying character ever in a film, is eaten by the monster. The other two find refuge under a bridge, film their final statements, and are blown to hell when Manhattan is leveled by a million bombs. I can't stress enough how annoying Hud is the entire movie. Other than that, it was perfectly entertaining.