Oddily similar this year I get called to a condo where handiless tenant zaps dryer with hot terminal ends of new dryer cord (get ready) - after he first plugs the unhooked up cord into the recepticle!
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The indoor double-30 breaker stays on, along with all the inside breakers. But the outdoor 100 breaker, below the meter, trips. I do not believe he had hardly anything else running in the house at that time. He was home alone with the wife gone. Wife came home and was grateful I restored power to condo AND hooked up the dryer cord, rather than her husband.