In which 1984 film do men ride giant worms and fight the forces of the Emperor?

In which 1984 film does Arnold Schwarzenegger first say "I'll be back"? "I'm So Excited" was a hit for which sister act? Kyle Reese, Sarah Connor and Dr. Peter Silberman are characters in which 1984 film? Which 1984 hit, Van Halen's only No. 1 single, is a synonym for "leap"? Which governor of New York gave a famous keynote address at the 1984 Democratic Convention? In 1984 a deadly gas leak at which company's chemical plant in Bhopal, India, killed thousands? Which 1984 No. 1 hit for Tina Turner dismisses love as "only the thrill of boy meeting girl"? Desmond Tutu, winner of the 1984 Nobel Peace Prize, was elected to which church office in Johannesburg that same year?