A Major Sprout at 9 months

Nine months old today. Unbelievable. That's ... almost a year.
The developments from 8 months have been remarkable. He is gaining more coordination from a sit-to-crawl position and vice-versa. The newest trick, as the video shows, is his ability to pull himself up. He's mostly doing it in his crib - where he has presented a new challenge when he's grumpy and not wanting to sleep. He'll now stand in his crib and pout. Sometimes, it's funny to watch him try to stand upright right in the middle of the floor. He'll have nothing to grab or support his weight, but he'll lift his butt in the air, straighten out his legs, do a push-up with his arms ... then try to figure out the next step, then quickly give up.