Fulci?

Aside from the Funky Forest music, I think there might be another musical shout-out of sorts in the movie. The music that plays near the end when Billy is running sounds like a cover of a Fabio Frizzi score from a Fulci movie. I can't quite place it, sounds a lot like Zombie, but there's a couple of his that sound like that. Pretty cool. It probably just sounds similar, though.