Greetings,
I have experienced a weird little bug, a few days ago, in McCoy Logging Camp. I have since tried to reproduce it, without success.
What happened is, when I entered one of the buildings, I stumbled upon a zombie dressed in a McCoy shirt, alongside what looked like a military helmet on the ground. As I got closer and I drew the zombie's attention, the "helmet" turned out to be a second McCoy zombie who's models were crumpled on the floor. It "unfolded" when the walking animation started and went back to normal, almost biting me in the process.
Unfortunately, I have no screenshot of the event. Just a description : the bugged zombie really was crumpled in a sort of ball, on the floor. It's clipping textures blended into each other, making it look like camouflage, thus my mistaking it for an army helmet.
I'll update the post with a screenshot if I see something similar again.