The victim was drunk and had already swung at a person or two - best guess is that the actual Uber driver got a peek and opted to drive away instead of picking up an unruly drunk...tragic that the perp thought he had to use such violence instead of reporting and then claiming any damages if his vehicle was harmed. I’m almost always armed and that makes me a lot more tolerant to the idiots out there - the value of life, even that which seems like scummy life, prevents me from interacting where disengaging is an option.
"...actual Uber driver got a peek and opted to drive away instead of picking-up an unruly drunk..."