The trains must go through and all that pioneer jazz, so pack and go.
5 seconds sound clip from Snagglepuss - Lion Tracks (S2E1).
You can hear this line at 00:03:42.605 in the Blu-ray version of the episode.
Quote context
[...]
- What brings you to these parts, major?
- I'm working for the railroad.
- In what capacity? Caboose tender, coal shoveler, or sort of a cinder sorter?
- No, by thunder! Track builder!
- Oh, that again. Well, I reiterate. Also reaterate!
- The trains must go through and all that pioneer jazz, so pack and go.
- You mean, like wagon trains. Giddyup, horsy! Giddyup, giddyup, giddyup!
- No, by Godfrey, I mean trains like chugga-chugga-chugga choo-choo-choo.
- You mean like... Chugga-chugga-chugga choo-choo-choo. Chugga-chugga-chugga! Whoo-whoo-whoo!
[...]