MOUNT CLEMENS, MI (AP) -- A failure in an underground electrical line apparently caused a series of gas explosions that sent utility hole covers flying and forced cancellation of a Goo Goo Dolls concert, officials say.The blasts Wednesday afternoon forced evacuation of part of the downtown for several hours.It happened as concertgoers were lined up for a performance by the Goo Goo Dolls at the Emerald Theatre. The concert was canceled.Goo Goo Dolls drum technician Shawn Dealey, 21, of Winnipeg, Manitoba, was about 10 feet from one of the utility holes when it blew up."I felt it, and then I hea