Sorry? What happened at Troll?
I enjoy that one as well. Less so the preachy folks that keep spouting it and other crap.
Some other reasons I've heard:
- Mummy's curse
- Bath salts
- Ancient parasite that escaped from melting permafrost
- Parasite that came up from the ocean depths.
- One guy called Darren didn't complete to go kiss someone, and this is the result
- A computer virus that jumped species
That last one comes from a former computer programmer who seemed like he'd put some proper thought into it. But he was drunk, I was drunk, the ghoul in the pit next to us was probably drunk, so I can't remember most of it.