I love how those defending the clearly out of control cop ignores the cop in the start of the video and the other cop who was handling it great. Very calmly talking to the kids, thanking them for handing him his flashlight back, telling them not to run (BTW- Running from the cops is NOT a crime. Supreme court decided that). He was handling that situation just fine. Then the clearly out of control cop comes flying in and starts yelling at everyone barking orders and everywhere he goes - trouble seems to follow.
14 year old in Bikini - CLEARLY not a threat. I don't care if she was talking back or not -She was NOT a threat. He told her to walk away a few seconds before, so she wasn't suspected of a crime at that point.
He lost control. The other cops saw it, the city has seen it, everyone who watches that video sees it.