Oh boy, I had a power went out 2nd times in my apt bldg, it's was buried cables blew out while I was on the lappy, I heard explosion and felt vibration and then power out, I knew the buried cable just blew out underground. I called my electric company for an emergency repair service, 1 hr later, the Xcel trucks with back hoe tractor came in, digging out, they cut old blew out cable and replace with new coupler onto cable, finally the power back on in 2 1/2 hour after repaired.