Pull to stand

This last weekend, Babriel pulled himself up to a standing position at the couch. I was amazed because I wasn't really focusing and then all of the sudden, BAM, he was up. It's weird because he generally hasn't liked to stand holding onto something besides me or Chris' hands (aka I've tried to get him to stand up while holding onto the chest, etc but he has none of that). Wow. He's getting so big. I feel old...