Mike Miller's putback slam on J.R. Smith.

What is up with Mike Miller lately? Why, and how is he still able to do this dunking thing? Seriously, this shouldn't be possible and for that sole reason alone, J.R. Smith should just pack it up and call it a career now. If Mike Miller dunks on you at this stage of his career, and it is at it's very end, you should just retire. There are just no excuses for something like this to happen, for shame, man.