Ha. Later in my nuclear career, I realized the genius of Doc's claim:
"Does it run like on regular unleaded gasoline?"
"Unfortunately, no. It requires something with a little more kick: Plutonium!"
"Ah, Plutonium. Wait a minute, are you telling me that this sucker is nuclear?"
"Hey hey hey! Keep rolling! keep rolling there! no no no no! This sucker's electrical! But I needed a nuclear reaction to generate the 1.21 gigawatts of electricity I need"
I should try that in public. No, those aren't nuclear plants over there. They're electrical! They just use nuclear reactions to generate the electricity you need.