Lucas is SO funny! I have GOT to get a good video of him doing this (I have a couple but they arent that great). He is DANCING!!! If he hears music he will stop and dance! Or, if I say "dance! dance!" then he will do it too. Now we're talking about a 10 mo old here so his definition of dancing and ours a quite different. He dances in 2 positions- standing up or on the floor on all fours. When he is standing up he bobs up and down- knees out! (think country-music style). When he is on all fours (in a crawling position) he will rock back and forth on his hands and knees.
He's such a ham!!!!