Marty McFly: "Whoa. Wait a minute, Doc. Are you trying to tell me that my mother has got the hots for me?"
Dr. Emmett Brown: "Precisely."
Marty McFly: "Whoa. This is heavy."
Dr. Emmett Brown: "There's that word again: 'heavy'. Why are things so heavy in the future? Is there a problem with the earth's gravitational pull?"