Put a protester down with a projectile. The surrounding people rush to his aid, then throw a flash bang into the crowd to scatter and disorganize them.
Doesn't really take into account of the person on the crowd, nor the possibility of blowback from their action.
That is your theory? That the police deliberately aimed to disable someone, perhaps even kill them in order to create a an environment to cause more panic and further their goal to break up the crowd?
Do you think they specifically discussed this strategy at their briefing before they formed up, or do you think it was a couple of them acting in tandem on the spur of the moment?