Imagine for a moment, a man threatening to hit you with a pole, who is in a wheelchair. He cannot move toward you as long as he holds the pole. There is little, if any threat here. Now imagine that you have a dozen of your friends with you. The man, who is in a wheelchair, regardless of the stick in his hand, becomes almost no threat whatsoever.
If talking to the man nicely, which most likely did not happen, was unsuccessful, simply walking behind him to grab the pole would have been simple. A couple of children could have taken the pole away from Zareck, yet it took 10 cops, 3 beanbag rounds, and a taser.