No, not an accident, just an intinerant seller of prawn crackers taking a nap. With his right foot touching the back wheel, he'd know if his motorbike was moving, as in someone trying to steal it. If that's his worry, why didn't he park it against a wall, then sleep on the other side? A thief would have to literally step over his body. I thought maybe he kept his bike on the road so there would likely be witnesses to a robbery, but that's not much of a deterrent here. I think he just didn't want to miss out on any potential sale! In any case, street crimes are very rare in Vung Tau. With its huge influx of poor people from the rest of Vietnam, Saigon has many more crimes.