Who are you trying to fool? It's the atomic fallout.
2 seconds sound clip from the Fiend Without a Face (1958) movie soundboard.
You can hear this line at 00:28:24.027 in the Blu-ray version of the movie.
Quote context
[...]
- Don't worry. I'll have this guy in check by tomorrow night. So long, Mayor.
(Chevrolet Fleetline Deluxe car engine starts)
- All right, fellas, all right now. Let's stop this nonsense.
- No fancy atomic radiation caused these deaths.
- What about the mayor? What killed him?
- Who are you trying to fool? It's the atomic fallout.
- All right Gibbons, where is he?
- If you'll shut up, I'll tell ya!
- Now, the fellow we're after is out there in the woods. Probably some mad G.I. that's gone wild.
[...]