These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Nightmare Fuel: While what was played in Tribute ends up turning out awesome or funny, the concept of what the duo went through is pretty nightmarish. Imagine you are just minding your own business, all of the sudden, the Devil comes and demands you play the best song in the world, or he'll eat your souls. There's no guarantee that what you sing next just happens in the best song in the world, so 99 out of 100 chances, you are going to have your soul devoured. Not a fun thought.