Board Thread:False Info and Speculative Discussion/@comment-4091815-20140604202725/@comment-6314684-20140604221521

I agree, berserkers seems like the most likely theory, considering how they were brought up on two occasions in 3B AND in the Searching for the Cure webisodes. They're bound to show up eventually! If it's not a berserker, then I'd hazard a guess that it was something Central/South American, maybe a chupracabra or something?