This video was filmed on a motorcyclist’s helmet cam in California. The motorcyclist is lane splitting when the door on a cargo cage opens up and strikes him.
According to the video’s description, “Loading doors swing open on a truck as I’m safely sharing the lane at a reasonable speed in California (where it’s allowed by law). Truck driver with unsafe/unsecured load fled the scene of the accident and was found at fault by California State Police using this video. Damage to my SKB/Caribou top case totaled it, as it would no longer close properly, and it was replaced under warranty.”
Video Credit: Behind the Handlebars