Former ALICE IN CHAINS guitarist JERRY CANTRELL and SEVENDUST exchanged insults from the stage during the two groups' respective appearances at yesterday's Edgefest in Barrie, Ontario after numerous technical difficulties during CANTRELL's set led to an abbreviated performance from the guitarist.The problems reportedly began when a planned 3:20 PM set by SEVENDUST was postponed due to a problem with the band crossing Canada's border. As a result, JERRY CANTRELL was asked to swap spots with the metal quintet, a seemingly simple flip-flop which ended up creating a rift between the two acts during the unfortunate chain of events that followed. After experiencing a series of frustrating mishaps during the early portion of his set, CANTRELL ended his performance with his current single "Anger Rising", but not before he threw his guitar to the ground and left the crowd with a disparaging remark toward SEVENDUST. According to MTV.com, CANTRELL omitted the "dust" in SEVENDUST and substituted a four-letter obscenity in letting the crowd know who was up next. SEVENDUST frontman Lajon Witherspoon, for his part, wasted no time in expressing his animosity towards CANTRELL during the group's Edgefest set, proclaiming "when JERRY CANTRELL says 'Fuck SEVENDUST, I say, 'Fuck you, JERRY CANTRELL.' " He then reiterated the message by saying, "I hope you heard me, JERRY CANTRELL." Edgefest was headlined by NICKELBACK and included additional performances from CAKE and HAND OF DOOM (ex-SMASHING PUMPKINS/HOLE bassist Melissa Auf Der Maur's BLACK SABBATH cover band).