Must've been some practical joker.
4 seconds sound clip from the Mister Ed - Season 1, Ep. 4 - Kiddy park TV Series.
You can hear this line at 00:04:58 in the DVD version of the movie.
Quote context
[...]
- Oh, no. You're wrong about Carol.
- If I were to ask Carol, I know she'd let me go in a minute.
- Yeah? They're leaping into the boat, huh?
- Hello, Roger. Well, I'll talk to Car...
- Wilbur, who are you talking to?
- Must've been some practical joker.
- Well, he certainly sounded like you. I guess he has a twin brother. Have you?
- Carol, I'm leaving tomorrow morning on a 3-day fishing trip.
- Your husband would like to accompany me, but he hasn't the nerve to ask you.
- Well, for heaven's sake. Is that all?
- Honey, of course you can go.
[...]