I agree, kicking is more of a child thing. Just to further expand on this speculation about Lucas being hurt at school and those who live in Kansas please pardon my ignorance if I'm wrong. If Lucas was being hurt by other children, either at school or in his neighborhood, it could possibly be the result of either racial or physical bullying. Racial because of his name, "Hernandez" or physical because of cleft palate/dental condition. We all know how cruel children can be, especially those who are given free reign to bully. This would explain the difference in photos of Lucas. I've noticed in photos where Lucas was with family, he appears to be a very happy, cheerful child. I haven't seen the typical physical traits in photos of abused children with Lucas (for instance, looking forlorn, fake smile, physical distance between him and other family members, etc). I have noticed though in some photos that appear to be school related, like the ones on his missing poser, he doesn't have the same look as he does as when he is with family.