1. "It's already mutated into human form, shoot it!"
  2. "What the hell is a jigawatt?!"
  3. "Why don't we keep all this brain melting stuff to ourselves?"
  4. "Who the hell is John F. Kennedy?"
  5. "Look at it rolllll!! Now we can watch Jackie Gleason while we eat!"
  6. "Lou, give me a milk: Chocolate."
  7. "...You really think I oughta swear?"
  8. (Not a line, but the face Doc Brown makes when the model car hits the pile of oily rags.)
  9. "Hey, we don't wanna deal with no reefer addicts."