A tisket, a tasket

The skeletal and muscular structure of the office worker pictured here must be very strong to hold up that giant head. For the head, you see, is made not of styrofoam or rice-cake...it's composed almost entirely of...I dunno, cement? cast iron? Christmas bundt cake? What's funny here? BAH - I can't think of anything even remotely clever at this time.
And this other guy...ahhh who cares...