He'd go about his ordinary business calmly, except when the fit to kill was on him.
5 seconds sound clip from the The Leopard Man (1943) movie soundboard.
You can hear this line at 00:49:58.800 in the Blu-ray version of the movie.
Quote context
[...]
- All those fancy courses were about the dead, Jerry, not the living.
- He'd be a hard man to find, Jerry, particularly if he were a clever man.
- He'd go about his ordinary business calmly, except when the fit to kill was on him.
- You've thought about all this before.
- You know it isn't the leopard, don't you?
- Here's luck to you both in Chicago. Must be great to be getting out of here, going to a real city.
- Yeah, it's a pretty good feeling, all right.
- And this place closing for the weekend will give us a couple days to rest.
[...]