I'm friendly just enough to get by without people calling me an asshole.
Shitty overfitted object recognition algorithm.
Same thing that happens when an Instagram filter recognizes random objects as faces.
I don't even know what that means but I hope that's the reason!
I'm not ready for zombies yet.
The gist of it is, making a computer recognize objects in an image is hard. Making a computer try really hard to recognize traffic participants and putting it in not-traffic will result in a lot of false positives.
What you see is a bunch of small-ish objects (gravestones) being recognized as small-ish traffic participants (small pedestrians) and sometimes other stuff. It keeps flickering, because it keeps trying to do a better job, and keeps failing, because the result makes no sense.