Jessica getting the upper hand on her muscle-bound captor Mad Dog by cutting his brachial artery, one of the five arteries you can cut to cause someone to bleed to death in less than a minute. Up until that point, her captors have been constantly terrorizing her, which makes it even more surprising and satisfying when she pulls it off.
'Jessica:' Tenth grade biology. Brachial artery... pumps 30 liters of blood a minute. There's only five in the human body. I'm sorry.