I'm confused as to what a waving debris means. At speed it'll look a lot like a yellow or a red depending on the rider which is why we've never used it waving, rocking at most for liquids.
Maybe it's just a standing flag in the previous corner as a forewarning and waving in the corner of concern?
Rule said waving but dunno. It's not something you'd really need a backup for, you'd use yellows for that.
Said he got hit by a car, I think he said that was in or on the way back from Lombok EDIT: got knocked off of a scooter, yikes!