If it wasn't for the fence being broken I would have thought it may be an oo oo bird taking off.
Well, we didn’t see the fence, it might be a rusty old barbwire fence which an animal can break leaning against it.
Most of the run of the mill fences in PA can be broken by a buck. I have seen them go to jump it and drag their rear legs through the fence. The weight of their bodies on it is often enough to break it.