 Opeth was scheduled to perform in Jordan without a crew due to the fear of terrorist attacks in the Middle East . Opeth 's tour manager distributed 6 @,@ 000 tickets for the concert , but before the band left for Jordan , drummer Lopez called Åkerfeldt stating he was having an anxiety attack and could not perform , forcing the band to cancel the show . In early 2004 , Lopez was sent home from Canada after more anxiety attacks on tour . Opeth decided against cancelling the remainder of the tour , with Lopez 's drum technician filling in for two concerts . Lopez promised that he would return to the tour as soon as he could , but two shows later Opeth asked Strapping Young Lad drummer Gene Hoglan to fill in . Lopez returned to Opeth for the Seattle show on the final leg of the Deliverance and Damnation tour . Per Wiberg also joined the band on tour to perform keyboards , after more than a year on tour . 
