I agree but I think the people there were in a grassy area, no rocks around, or anything substantial to throw. People were doing what they could with the little info they had at the time. They told the cops, were yelling for help (of course the cops were fools and did nothing, but that's not the people's fault), but ultimately I don't blame people for being confused or scared because for all they knew the shooter may have turned towards them and their families. For all they knew the shooter wasn't just going after Trump but anyone he could mow down.