The end fight question (little spoiler)
So, in the end, after killing all Viggo's henchmen, Wick is face-to-face with Viggo. "no more guns...", "No more bullets...", and they started fighting bare-handed. At one point, Viggo pulled out a knife. And Wick, holding the Viggo's hand, stabbed himself. WTF?? He didn't allow Viggo stab him, but simply pulled the hand holding the knife toward him and stab himself.
Why? WHY?? What are your thoughts?