Why is an oncoming vehicle waiting to turn left at an intersection the most common and lethal crash scenario for motorcyclists (the SMIDSY phenomenon), and how should a defensive rider respond?

1. Left-turning drivers intentionally seek out motorcycles to collide with
2. Motorcycle headlights are invisible in broad daylight unless the high beam is broken
3. Motorcycles present a narrow frontal profile that human visual processing misjudges in speed and distance; riders should slow down, cover the brakes, establish a space cushion, and perform a subtle lateral lane weave to create optical motion parallax
4. Riders should accelerate to maximum speed and close their eyes to pass the intersection before the car turns