South Park, Season 1

Barbrady:
Okay people, listen up. As we near the top of the mountain, the chances of our encountering some lava becomes great. Therefore, I have special ordered this training film to assist us in volcano safety. Mr. Garrison, if you would, please?

[Garrison turns on the movie projector to watch a 1952 training video called Lava and You.]

Instructor:
Harbingers of sorrow, natural disasters can be the cause of troubling and undesirable stress—and a volcano is no exception. But what should you do if a volcano erupts near you or your family? Here, we see the Stevens family enjoying on their picnic. But suddenly, daughter hears a noise: it's a volcano. Junior seems worried—but have no fear, Junior. Jane learned in school what to do when you hear a volcano erupt. [Jane uses a picnic blanket, covering her family] That's right, Jane—duck and cover. [lava passes through blanket, leaving family unharmed] So what will you do when you hear a volcano erupting? That's right, duck and cover. Looks like you got the idea. Duck and cover. Thank you and goodbye. [end of film]

Barbrady:
Okay, any questions?

Chef:
(indignant) That has got to be the most ridiculous load of pig crap I have ever seen!

Barbrady:
That's enough out of you!