Matthew keeps finding new places for me to baby-proof. He's so helpful! He discovered that he could crawl through the end table and get behind the couch. I had to take a quick photo before I rescued him and created a cardboard barrier so he couldn't get back there again.
Here's another photo of him looking out the window waiting for Jeremy to get home from work! The front windows are the only ones low enough for him to see out of, so now when he escapes from the "pen" he heads right for the window.