ZipKrowd Server Episode 3 - Broken mob spawn switch slash cry

This episode I rebuild the peaceful switch from scratch based on panda's now broken design : http://youtu.be/3-MJqk1bF68

I had already built and recorded this over a week ago and I've only just found out it's broken already :( ... https://www.youtube.com/watch?v=nuhhuucTR_k