Hybrid snakes?

So Im relativly new to the reptile world and I was wondering about Hybrid snakes. I know some people arent fans and some are I was just wondering if there is any information people know of before I go start googleing.

Youll have to be more specific...

This may be a good starting place on your info quest

http://www.worldofballpythons.com/morphs/hybrids/

I was mostly wondering which snakes can be bred and produce offspring, and if those offspring can breed. so basicly I was wondering if hybrids is like breeding a horse and a donkey and getting a mule (mules can not breed they are sterile)