side issue- the distortion of the spokes is screaming "rolling shutter effect", which tells me that the sensor was only read from one edge to another. If it was top-to-bottom, then the top pixels really could be older than the bottom ones, and vice versa for bottom-to-top scans. If it was left-to-right it's not clear to me whether that could cause false impressions, but it's certainly not a perfect representation of a discreet instant of reality.
It is a kind of rolling shutter effect, but you're misunderstanding the finish camera's design - they capture a single column of pixels and the horizontal axis is actually time. This is why the background of photofinishes is a bunch of streaks.
