Meet a 600+ pound Siberian Tiger named "Rocky".
I was shooting through a 6"x6" welded wire mesh so I had plenty of room to insert the camera lens and steady it on the wire. Of course if my camera lens can get through the mesh, Rocky can also get his paw through...and he did. This was the start of his charge. I took this one image and didn't wait around for him to arrive where I had been.