That would be a kind of insider joke to one point in where the player becomes and stays a frog. I think that was a bug somewhere deep in the sewers of Verdistis.
No bug just a chest with a polymorphspell (inrevesable though)
I kinda think 'bug' works better, honestly. You should at least have got a game over screen at that point. It's not like you could ever continue, after all.