I Sat Myself Up

It's nap time. Well, it's supposed to be nap time. I lay Brock down in his crib, cover him with a blanket, give him a pacie and a bear, and call it good. I walk out of his room and hear happy babbling sounds coming from his vicinity and figure he'll fall asleep eventually. After several minutes I still hear him, so I go in to check, and this is the scene before me. A wide awake Brock bouncing on his crib mattress. Not only is he not sleeping, but he's no longer laying down. I have never seen him get himself into a sitting position on his own, but apparently it's his new trick. He hasn't shown me how he does it, but something magic happens at nap time when mommy walks out of the room...