Complex sentence: Henry is caught by Stuart to cut his arms with the razor blades but Jigsaw stabs Stuart tells him is wrong and promptly shoots Stuart, then he attempts to kills his own son.
Split into simpler sentences: Henry is caught by Stuart, who cuts his arms with razor blades, but Jigsaw stabs Stuart, who tells him, he is wrong. Jigsaw promptly shoots Stuart, then attempts to kills his own son.