 However, their set was cut in half by a drenching thunderstorm, in a scene again reminiscent of Woodstock, people were covered with mud.During the storm, keyboardist Garth Hudson performed his signature organ improvisation "The Genetic Method"; when the rain finally let up, the full Band joined Hudson on stage, and segued into their signature song "Chest Fever", in a manner similar to how the songs were presented on The Band's live album "Rock of Ages".Finally, the Allman Brothers Band performed for three hours.