Yeah, it appeared he was doing the lone ranger routine. Rest assured, had another officer been present the guy wouldn't have gotten anywhere near that close to them. You can see in the video that the officer is clearly bothered and feels cornered being that he is surrounded and has at least one civilian antagonizing him. I imagine he felt like a man with a 6 shooter surrounded by a group of zombies. He'd do anything he could to control the situation, but he's only one man.