It's been a long time since I've had to put my hands on anyone with intent. I'm older, and have no need to prove myself to anyone. I also don't go where I used to go, I don't hang out with the old crowd, and I try not to act like an idiot like I used to. I have walked away from two fights since earning my Black Belt. I'm kinda proud of that. Having said all that, I train for the bad situations that I have no control over. We train to continue to fight as long as our assailant is fighting, and maybe just a tad bit longer. That's from my own personal experience. I have had situations where my opponent has gotten off the ground and I needed to re-attack. I can't worry about reasonable force. Once the bell rings it's all about staying alive. We train for the street. We train for the super bad situations where it's often life or death. God forbid anything should happen to any of us....but we train for the worst. With a weapon attack, I teach our students to disarm, disable, but don't kill the attacker unless it is necessary. It all just depends.
Thanks.