We're driving across the country. The last thing we need is bad luck.

4 seconds sound clip from the Dumb and Dumber movie soundboard.

You can hear this line at 00:23:12.066 in the Blu-ray version of the movie.

Quote context

[...]

- Anything else before I leave the area?

- No... yeah... yes, yes, my soda's flat. It doesn't have any bubbles.

- Happy now?

- Feels good to mingle with these laid-back country folk, don't it, Harr? I like it a lot.

- Uh-oh.

- What? What's the matter?

- You spilled the salt, that's what's the matter. Spilling the salt is very bad luck.

- We're driving across the country. The last thing we need is bad luck.

- Quick. Toss some salt over your right shoulder.

- What the hell?

- Uh-oh, too little too late, Harry.

- Who's the dead man that hit me with the salt shaker?

[...]