In the Doctor Who episode Heaven Sent (series 9 episode 11), the Doctor
spends four and a half billion years bashing a passage through a wall of Azbantium by using his hands to punch it again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again and again ...
Why does he use only his hands for this task? Earlier in the episode he'd seen a couple of spades, which would surely have got the job done much quicker. Even if we assume the spades were unavailable for whatever reason, he could certainly have used his booted feet. When he's standing there
in front of the wall, he could attack it with his feet just as easily as his hands. Surely using his feet would cause him less pain and also create a marginally greater hole in the wall with each blow, possibly cutting down the length of his task by a few million years?