I was thinking of great ideas for horde events, and one I had come up with a while ago was a mode called Former Friday. The mode would consist of every wave being massive amounts of formers, and the difficulty would be on insane. The boss waves would probably be gunkers, because they are lambent, and no where near as frustrating as lambent berzerkers. I didn't really know if fortifications would be a good idea or not.
The main point of this thread though, is to talk about creative horde event ideas you guys have ever come up with.