Fair point. For more context the waymo just made the right turn and there was a line of cars in front moving slowly or still. The skateboarder was crouched down

Fair point. For more context the waymo just made the right turn and there was a line of cars in front moving slowly or still. The skateboarder was crouched down and going fast between the cars and the gutter (against traffic). Perhaps from the driver's seat you'd get a glimpse of the skateboarder but it would be very late. No other cars in front made any adjustments. I did hear the skateboarder as it went by.