The opening quote - "He stripped off his skin and tossed it into the fire and he was in human form again." - is from the Brothers Grimm fairytale "Hans the Hedgehog".
The words Monroe speaks when saying goodbye to Larry are "Alles hat ein Ende... nur die Wurst hat zwei," which translates to "Everything has an end... only a saussage has two." This is also the refrain from a somewhat sad, somewhat funny, and popular song in Germany about a man breaking up with his girlfriend and regretting it. This line is usually used for comedic effect in Germany and probably would be considered rather inappropriate or sarcastic in this situation.
The characters Michael Patterson and David Gimlin, are an obvious reference to Roger Patterson and Bob Gimlin, who filmed the famous Patterson/Gimlin video of Bigfoot at Bluff creek in 1967.
"Woge" comes from the German word for "wave."
"Wildermann" comes from the German "wilder," meaning "wild, savage, fierce, feral, rough," and "mann," meaning "man" or, sometimes, "person."