This may or may not be a destabilizing moment like 1979. Mass movements like this are completely unpredictable.
But regardless of the motive, I don't see how this could be faked. I don't see how you can have blood in your eye and not blink, or have blood fill up your nose and mouth and not cough or spray the blood, or keep your eyes fixed and let them glaze over for an extended period of time.
There are reports on Twitter that khamenei has fled Tehran.
Yes, it is about much more than the election. Maybe they will get rid of the Mullahs.