In film, a movie cliché is a line of dialogue, an event, a stereotypical character, or a plot twist that has been seen over and over in films. Critic Roger Ebert began making note of clichés in his columns. Some, such as the spit take, are unique to comedy, and can be appreciated for both their familiarity and surprise. The clichés are inverted in other installments of the trilogy, with Marty interrupting Doc Brown's romance with Clara, or Griff not being taken in by Marty's "What's that?" trick that worked with Biff 60 years earlier.