Pale Yellow,
Many thanks for reading, and many many thanks for making the mental effort to compensate for my mistake and read it to the end!
There's a new version here that has the correct cue-lines:
https://drive.google.com/file/d/0B3FgBYschJXbSGZtb0hwdVdaelE/view?usp=sharingRichardR,
thank you for reading as well. The lava floor is, as you noticed, very inaccurately displayed. "The floor is lava" is actually the name of a children's game, and in that game chairs and sofas and such can be considered made of non-flammable materials. I had considered making the lava more true to life as well, since the story is an extreme version of the children's game, but I felt that making it more scientifically accurate might distract from the characters and make an already fairly challenging short even more complicated to produce.
As far as the ending goes. There could be a lot of different endings. I chose for a deadpan, play-it-straight-until-fade-out version, but I can easily see how someone might prefer a version that falls back on it all happening on a set, maybe something like the second actor calling out a foul because of the oven mitts, and the first actor saying something like "Nuh uh, they're fireproof. It says so on the label. And besides you're dead! You can't talk." and then the director cutting in to arbitrate on a childish argument, taking everything back to the initial sound studio framing device and the children's game premise.
And as far as the ending goes, it might be worth mentioning that "The Floor is Lava" is licensed under the Creative Commons Attribution 4.0 International license, which means that if you don't like the ending, you can simply change it and produce your own version instead. You don't need my permission to do that,or even let me know you did it.