Which 1984 hit, Van Halen's only No. 1 single, is a synonym for "leap"?

Which band had a No. 1 hit with "I Want to Know What Love Is" in early 1985? 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? In which 1984 film do men ride giant worms and fight the forces of the Emperor? 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"?