[Music] It's a beautiful summer day in Boston. My partner Greg is on the Charles River fixing a client's sailboat. And in a heartbeat, everything changes. A wooden sailboat mask 30 feet high. That's the height of a telephone pole weighing 80 pounds. That's the weight of five bowling balls. Falls directly onto his head. He survives, thank God, but suffers a traumatic brain injury that forever changes his life and mine. Greg is calm and collected one moment, then without warning, anxious and agitated the next ...