I will never forget the sound of the fist smashing into my friends face. The slow motion of his eyes rolling back into his head and the classic spam of his shattered nervous system as he collapsed, his head bouncing onto the cold wet pavement.
Under extreme duress the brain diverts additional processing power to the visual cortex, making time seemingly slow down.
I watched them wind up to stamp his head into the kerb. It seemed to take an age.
I had failed. Failed to identify the threat. Failed to act before it escalated. Failed to end the issue with words.