A friend of mine was showing me how a broken shell extractor worked. He put it in the chamber and released the bolt. He said it would grab the case and pull it out. The only problem was he did not have a broken case in the chamber when he did all of this. How can he get this out without missing up his rifle? I told him to slam the buttstock on the ground and pull the charging handle back at the same time. Did not work. Please help!