on the 1977 tour, jimmy plays the riff differently. instead of playing it like below; going to E first and the to A...
|------------------------------------|------------------------------
|------------------------------------|------------------------------
|------------------------------------|-------------------------------
|-2p0-0----------------------------|-2p0-0----------------2-----|
|---------2p0-0--------------------|---------2p0-0--------0-----|
|-----------------3b4-0------------|-----------------3b4---------|
he plays some weird chord that sounds as though its route note