I was getting setup on Der Eisendrache while waiting for a friend to join.
The dragons were fed and my friend was running late so I decided to try out the zombie multiplication trap trick for the 1st time. I think I "only" did it 5 or 6 times.
After he joined I started and completed the Void Bow, ran out of ammo I decided to PaP.
I've been using the PaPed starting pistol with Danger Closest a lot recently which I'll use as my excuse for what happened.
I have no idea how many zombies were left. The spawns were not slowing down.