I was going through old files and ran across this. It made me laugh - I was reading how its Steve Martins birthday (another funny man like my father I admire) and they aid that his comedy was all about creating tension and then not releasing that tension, letting the audience release it through their laughter. This is a good example of that tension.
I always wondered what happened after this picture was taken and if the photographer would still have published this if something bad had happened to the dog. One thing for sure; the Butt to Dog ratio is out of this world.