I don’t need a political fact checker to tell me what I observe with my own eyes: His “fall” looks like a flop. I have no doubt his injuries happened; I just doubt his fall was caused by the police.
One final point: This agitator Mr. Gugino has a terrible history of trying to make himself important, but without really exposing himself to any great risk. His actions were things like protesting the use of armed drones at a military facility (!); sitting in the gallery when his friends were in court and trying to offer them strategy tips, and basically coming off as an old hippie trying to make like this is the 1960s and he’s still a kid. That’s also 100% consistent with rushing out to have “fun” when a protest popped up. To me, he has zero credibility about anything.