I never had anything wrong with my heel except the time the sting ray stung it when I stepped on him when swimming and paralyzed the lower leg and made the unbearable pain.
Again, you can be watching your show as you're doing this, or you could be talking to someone, and this is just kind of connecting to the lower body, finding that sit bone to heel connection.
Ahab had now gained his final perch, some feet above the other look-outs, Tashtego standing just beneath him on the cap of the top-gallant-mast, so that the Indian's head was almost on a level with Ahab's heel.