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?