I remember that Pitt/Butler game, and quite a bit differently than you do. For one, Mack fouled Gilbert Brown about 60 feet from the hoop, on what was a majorly lucky break for Pitt. They inbounded the ball, and the pass was so poor that Mack nearly got to the ball before Brown did from halfway across the court. It was still basically a tie, but they called Mack for the bump.
The foul call on the ensuing rebound was 100% the right call, and just a boneheaded play by the Pitt player. For some reason, he not only tries to go over Howard's back, but he swipes down over the back and grabs Howard's arm clear as day. Judge for yourself: