I attended this concert . It was phenominal . They played intensely for approximately two hours , took a short break , then played for another two ! The seats on the floor were on top of an ice rink ,probably covered with plywood . We were cold, but we rocked the house with one of the all time great rock and roll bands . People were jumping up and down on top of metal chairs ! It was my younger brother's first concert . Wow , what a memory !