What happens when Austin goes out the doggie door?

Austin's new favorite thing is to go out the doggie door and play by himself. I have just taken to the habit of watching him out the windows and doors to see what he will do. As you will see in the slide show--he seems to be enjoying himself. This is from two different days this week after he escaped out the door. He normally plays anywhere from 10-30 minutes before he wanders back in or I go get him...what a mess he is!!