“I’m just a prisoner of rock’n’roll,” hollers a giddy Bruce Springsteen, hamming it up gloriously in this spine-tingling film of two 1979 MUSE Benefit Concerts from Madison Square Garden. With The E Street Band on lean, mean form, Springsteen pours out his heartland testimonials with customary ragged power: ‘The River’ is heart-rending, ‘Sherry Darling’ jubilant. And when he and late sax-man Clarence Clemons lock into a shared groove, a bond enshrined in rock myth bursts into renewed life for 90 magical minutes. This one’s born to run (and run).