Stewie: Well I suppose it's not the first time someones made a miscalculation.
(Cut away to Back to the future)
Marty: What happens to us in the future Doc?
Doc: It's your kids Marty somethings gotta be done about your kids!
Marty: What do you mean?
Doc: Your daughter marries a black man!!
Marty: That's actually not a big deal for me
Jennifer: Yeah me neither
Marty:Yeah I mean what's wrong with that?
Doc: oh oh ah Nothing! nothing it's nothing I guess.. I think it's great! congratulations.
Marty: I don't think I'm comfortable around you anymore.
Doc: Did you know Peanut Butter was invented by a black man?
Marty: Too late Doc.