Der Hammer
"Where is the Flux Capacitor?"
"It wasn't a Flux Capacitor avaiable from DeLorean."
"So the Flux Capacitor was aftermarket?"
"To my knowledge there is no such thing as a Flux Capacitor."
[...]
"Where did you put the Flux Capacitor?"
"I don't have a Flux Capacitor. It didn't come with a Flux Capacitor, we never had a Flux Capacitor, there is no such thing as a Flux Capacitor!"
[...]
"I'm noticing the space where you guys removed the Flux Capacitor."
"There is no such thing as a Flux Capacitor, there never has been a Flux Capacitor..."
"LIES! Why do you trying to keep the time travel a secret? The people deserve to know the truth."
"Look, if you ask me again about the Flux Capacitor I'll have to ask you to leave the museum."
"Okay, I won't ask you again...ahm, was it the year after this one that they started to put the Mr Fusion on the cars?"
[...]
"Was it John DeLorean himself who invented the Flux Capacitor or was it someone else at the factory?"