In Requiem for a falling star, Columbo pulls up to the Movie Studio guarded gate and the guard looks at his car and thinks he is there for the demolition derby car crash scene. He proceeds to tell him where to go for the scene. Columbo says he doesn't know anything about that, he's a cop. The Guard lastly asks him if he's ever thought of getting another car. Columbo says he has one but it's nothing special, just for transportation......so Hilarious........
And in the same episode Fallon tells Columbo that he would never Typecast him as a detective.
I'm not sure if it does, but if this includes completely accidental ones, there's Arlene Martel having to explain to him that she's quoting the price of the band not an entire watch.
Of course, he doesn't take it badly and neither would I.