Columbo1971

Lt. Columbo:
[intrigued by a mirror image photo of the same woman] Maybe I'm nuts but, uh, this is the same photograph, isn't it?

Camera store clerk:
Yeah?

Lt. Columbo:
Well, I was lookin' at this thing before and, uh... Now in this picture her left arm is bent, but in this picture her right arm is bent. I mean, now she's got two bent arms.

Camera store clerk:
Well, you see, that's a reverse negative, Lieutenant. You see, what's originally on the right comes out on the left and what's on the left on the right.

Lt. Columbo:
You mean, I could have a picture where I'm on the right and my wife's on the left and we do this reversal and then I would be on the left and my wife would be on the right?

Camera store clerk:
Absolutely.

Lt. Columbo:
I'll be a monkey's uncle. You learn sum'pin' every day.