Both looked like stock traders or money exchanges. High stress like air traffic controllers. One of the relatives on my mom's side was ATC. He had some serious thoughts of killing himself and baled out on the job. For some when they start to feel the heat they have the sense to bale out. Some don't and flip out.
As for not fighting back what if he had a knife or a gun? Would you be willing to get hurt or die attempting to subdue this man? The answer for most is no.
For those of us trained in close quarters combat, this guy would be either in some serious pain or dead. I prefer dead. Less paperwork.