A video shows NYPD arresting a participant in the anti-Wall Street protests and violently throwing him to the ground. According to Occupy Wall Street’s website, the arrest was over a dispute about the legality of using tarps in the demonstrators’ camp. They claim that protesters covered their possessions and video equipment yesterday morning with the plastic, which police said counted as “tents” and were therefore illegal. The demonstrators resisted removing the plastic, and four officers ended up grabbing a lone protester sitting on the tarp. The video ends with an officer aggressively throwing the man, cutting the man’s arms, mouth and jaw in the process. Occupy Wall Street has posted videos showing arrests into day five of the demonstration. There have been four arrests Wednesday alone.