[alternatives?]

Once the fog gets thick, pipe in the sound of growling dogs from back of store.

[Leaning Right]

> Once the fog gets thick, pipe in the sound of growling dogs from back of store. <

I guy I knew worked security for a large amusement park. The park closes at 11 PM. Here’s what he told me.

At 10:30 an announcement is made over the PA system: “Park closes in 30 minutes.”
At 10:45 another announcement is made: “Park closes in 15 minutes.”
At 11:00 a last announcement is made: “The park is now closed. Warning, warning. We are releasing dogs in five minutes.”

That last announcement always gets the stragglers out of the park.
But of course there are no dogs.

[Allegra]

Once the fog gets thick, pipe in the sound of growling dogs from back of store.

I like that!