@ Mykidsmum
Very good find! I agree with you. I always thought that the "penguin move"-man was a body double (big big ears and no body tension at all and very very thin - no way that this man weighed 136 pounds!).
Another thing are Mike's teeth. He had always straight beautiful teeth and the teeth of the O2 guy and also the This is it-Mike had NOT these teeth. They are irregular and the mouth width incredibly wide.
And as the autopsy report do no mention "ivories" I think that the ears and the teeth givt it away!!!!
Which "This is It guy" are you talking about?? Like which outfit?