What does he think ? --- What is he thinking, that man who trembles between a gun and a wall ?

Answer ?

Rephrase the question
if you think it necessary:
Between a gun and a wall
what is it that he is thinking,
that man who trembles,
within eye shot, buried in his time
and nonetheless about to be taken
from it by a blow
that the mother who bore him
could never have dreamed of ?