There's a reason why Thunder and Lightning sound like they do in the second game. Lightning is quick, and when seen in real life, it's a shrill, twisted shape (matching her voice). A thunderclap is more booming and low, and is a bit more slower than the flash of a lightning bolt.
Sam proving to Otto the rowboat that wood like himself floats by demonstrating with a wooden plank... which promptly sinks the moment their backs are turned.
Assuming that the Land of Darkness is a product of Sam's imagination, what will happen to the mines when he learns that lava is hot enough to melt metal?