Everyday, Batman gazes patiently out the tall window next to the front door. He bides his time, waiting for another dog or a jogger to pass by. Then he unleashes what I can only guess are a stream of expletives in dog language. It's pretty explosive. One time he was jumping so hard at the window, he scraped the area next to his right eye, losing a chunk of skin. I didn't figure out how he done this to himself until I found the patch of skin still stuck to the wall!
Winner: FRONT WINDOW!!
... but don't worry. Batman would soon have his revenge.