When he opened the bag he was shocked to find a bag of sand and a voice recorder. He has been tricked by the robots. The robots shoved the man in the bag. They did this because they were badly treated and didn’t like doing their job. The robots did what he would do to the prisoners. Make sure they can’t get out and torture them. So that’s what they did first they kicked him and then punched him. Then hit him then cut him. Then hit with a car and then the worst of all threw him off the pier.