The most wonderful part of being a parent are the experiences that surprise you, moments just like that one. It's as if there is a glimmer of an adult with duh similar humor to yourself having fun in a situation. I think the camera caught lightning (or maybe just a funny, cute, spontaneous flash) and we were lucky to see it too. I think it's not even conceivable to consider Bill and Jen 'train' their children to act out a scene for the camera. More likely, Will simply wants to get a positive reaction from his family with the things he does. Which is much better than acting like a brat or an out of control child. If you ask me, and I know none of the negativity in here would, these kids are doing great. They continue to improve, they are happy, they get more exposure to their extended family than most families do, they are being educated and well cared for medically. I am not sure why anyone here would presume to know more than they do about their children's timeline of progress or how we can doubt the veracity of their intentions and actions.