I'd recommend Episode 42 of Campaign (an Edge of the Empire actual play podcast with a cast of professional improvisers recorded and edited professionally, it's so good I can no longer tolerate any other actual play podcasts because they are so bad in comparison). They take a break from their normal adventure to run a horror session (using the Dread micro RPG system) as they must clear their ship of a horrible infestation during the middle of the night. If it wasn't for the fact that all of my players also listen to Campaign I'd copy this idea pretty much unaltered.