False Colors (1943)
Mark Foster: [to his henchmen] ... don't forget, no matter how foolproof a thing might be, one wrong move might ruin everything, so be on your toes, all of you.
Rip Austin: [to the other gang members after Foster has left] I certainly got to hand it to the boss. The whole thing is foolproof.
Hopalong Cassidy: [referring to imposter Kit Moyer] I got a feeling that boy isn't in this alone.
Jimmy Rogers: You mean someone else is pulling the strings?
Hopalong Cassidy: My hunch seems to run that way. At least we're not tipping our hand just yet.
California Carlson: And what's our next move, Hoppy? I'm just itchin' fer action.
Hopalong Cassidy: Ease down, you old fire-eater. If I'm not far wrong, you'll get plenty of action and soon.