As pointed out in comments, “stand in a doorway” is not good advice in modern buildings — the idea originated with an older architectural style where doors were reinforced more than the rest of the structure, not less.
Of course, it was never good advice when it comes to the doorway of a fake plywood set…
Actor (Blan): You see, Grassie and Hedge both play these cute funny versions of themselves on the show, but they’re very different in real life —
. . . um, honey? What are you doing?
Grassie: They say you’re supposed to stand in a doorway when there’s an earthquake, right?
Actor (Blan): . . . Okay, she’s mostly different in real life.