aww, I had a dog that was going blind.

Had 3 dogs at the time, they all ran out to chace a squirrel or something, Squirril ran under a chicken wire fence, oldest dog sees this and darts to the side around the fence.
Our Chihuahua runs under the fence.
Dummy, sees the chihuahua and things the fence is not there.
Dummy plows into it in full speed, and collapses into himself. then he looks back at us like we did it to him.