Jackson makes the cutest face when he is trying to do something and it doesn't work out. In the video below he has a phone that has an attachment that he doesn't want on it. He is pulling so hard that he strains himself and shakes. He does this a lot at restuarants when he is trying to buckle the belt in his highchair.
If you look real close you will see a bump on his head where he just slammed it into the DVD stand. He is such a clumsy kid.