Jack Black has no idea who will take him down during his upcoming Friars Club roast. “I don’t know who is going to be there; it’s going to be a total surprise,” Black tells Page Six. “Anyone could really take me to pieces. I’m not gonna give any ammunition away.” He added, “I regret having ever agreed to it, but I’m going to go through with it.” The “School of Rock” and “Bernie” star joins the ranks of roastees such as Betty White and Quentin Tarantino April 5 at the East 55th Street club.