Now I'm not saying the police had to back off and let them go, but Jesus you'd think these motherfuckers are better trained at this to know that shooting some kids in the face is perhaps a little too much. The tear gas would still work if you shoot near their legs.
Well, what would you like the police to do? The protesters started shoving them, and from the looks of the video, were also trying to pull cops into their crowd. You can't expect the police to play nice when that happens, because adrenalin is pumping, the cops are scared for their lives, and rightfully so.
And no, tear gas at the legs wouldn't really work at that close of a range. All it takes is a few seconds to pull a cop 10 feet away behind their lines. If that happens, then it turns into a real mess, because the cops have to go into the crowd full force to save their comrade.
How would you have liked them to handle it?