Ok.. A few things I noticed about this one...
When Mac punches the bad guy out with the sock puppet.... there is no way he could not of be seen... he was standing right there... I just don't buy that one....
But that is not the main thing I want to point out. When Mac puts the drum over the other bad guy, if you look very closely you can see that the guy actually has to hold up the drum with his hands! He is not pinned....that drum would fall if he did not grab it. It is hard to tell and nicely done but if you are looking for it you will see it.
Next time you watch that ep.... look for it...