Talk:Operation: Undead Swarm/@comment-25577324-20141024214246

having a problem - I am using my cobras to take out Undead Berzerkers, Bombers, and Juggernauts, but for some reason, out of nowhere, all of my choppers will suddenly die and crash. I am not close to any spitters, turrets, or other things that can take them down, and it just keeps happening. Very Frustrating. Anyone else having this problem?? I am on wave 40, but it has happened on earlier waves too...

help??