Ok, I'm a liar. There isn't a gila monster under there. Let's see you stick your hand in and get your goods out. Go ahead.
7 seconds sound clip from the The Treasure of the Sierra Madre movie soundboard.
You can hear this line at 00:48:53.881 in the Blu-ray version of the movie.
Quote context
[...]
- Well, I'll be. So that's where your goods are hidden, eh, Dobbsy?
- Seems like I accidentally stumbled on Dobbsy's treasure.
- Why were you trying to pry up that rock? Tell me that.
- Because I saw a gila monster crawl under it.
- Oh, brother. I got to hand it to you. You can certainly think up a good story when you need one.
- Sure, I will. Don't you try any bad moves.
- Don't worry. I'll stay right where I am. I want to see this.
- Reach in and get your goods. If you don't, we'll think you're yellow, won't we, Howard?
[...]