You're right! It is! It's... [ Okay, how did you describe this thing? ]

...It's a car. It's, ah, it's kinda square-ish lookin' in the front? And it has gull wings! I mean, that's what a normal one looks like. [ How do you even describe the time machine though? Marty can't name half of the parts... ] The one you built has a little nuclear chamber in the back where you put the plutonium, and wires that go around the front.

[ He tried. ]