The Chicago-based band wrote this 1982 hit as the theme song for Rocky III. In this movie, Rocky, portrayed by Sylvester Stallone, faces off in a boxing match against Clubber Lang, played by Mr. T.

While seated in the chopper, he performed an unreleased track. Later, he dramatically rappelled from the helicopter on to the stage. The set list included hits such as “A$AP Forever,” “RIOT (Rowdy ...