Mark 15

39 Well when the centurion, who was standing opposite Him, saw that He breathed out His spirit after giving such a loud shout,*A mere handful (0.4%) of the Greek manuscripts, of objectively inferior quality, omit ‘after giving a loud shout’, to be followed by NASB and LB. he said, "This man really was God’s Son!"*Any centurion would be a hardened soldier, who had seen no end of crucifixions. He knew that a cross killed by asphyxiation. Hanging from the hands, with the arms stretched out, pushes the diaphragm against the lungs so you can’t breathe. Nailing the feet was a sadistic procedure to prolong the agony—even though painful, the victim would push up so he could get a breath, until finally too worn out to do so. Breaking the legs would put an end to that expedient, and the person died within a few minutes, asphyxiated. Someone who is dying asphyxiated does not shout. Since Jesus gave a loud shout, but then immediately died, the centurion knew beyond the shadow of a doubt that the cross had not killed Jesus (later, when Joseph asks for the body, Pilate is surprised that Jesus could already be dead). But who can just tell his spirit to leave? Putting two and two together, the centurion concluded that Jesus was a supernatural being. Just so!