In a way it is protecting my investment , as you said yourself , you never say stop . What if it were some fool with their hands about your throat ... Or with blade in hand ... I know I would stop before that final line was crossed as you are ...

Question: Why is the narrator so protective of the subject to the point of aggression ?
Answer: They have a financial interest in the subject .They have a mentor relationship with the subject .They have a tight bond with the subject .They have a family relationship to the subject .