Must be a Halloween gag.
4 seconds sound clip from the Dimension X - Almost Human by Robert Bloch classic radio drama series episode.
You can hear this line at 00:15:27 in the radio play.
Quote context
[...]
- I wish we could open a window and get some fresh air.
- We can get that after we unload. That's a rule of the company that we...
- What's that up ahead? Looks like something shiny in the road.
- Right.
- Holy smoke. You see what I see? Looks like a mechanical traffic cop.
- Standing right in the middle of the highway.
- I don't know. We'll have to slow down.
- Get on that gun, Sam. Let's take no chances.
- I'll give it the horn... It don't budge.
- It's pulled up right behind us.
[...]