my meter box was humming; I looked around for a cause, couldn't find one. Went outside, was reading on the verandah; 1/2 an hour later came back inside and the humming was much louder. I rang the power company in a mild state of anxiety and she said the truck was in the area and would call in. a few minutes later the noise was so loud, like drumming; i rang the power company back and told her to hurry; I was panincking, fearing the house would blow up. She reassured me they were nearly there, so I bravely went in and started to move stuff from a box below the fuse box. The noise moved too!! An old electric toothbrush waiting to be recycled had miraculously turned itself on and was vibrating on top of a wooden box. When I rang the power company to explain; there was a stunned silence at her end.
A friend says the power company probably use my calls as training aids! I'm just glad i don't have videophone.