I had the gas company come over to put a shut off valve behind the kitchen stove this morning. While unplugging the 110 electric cord i noticed a flicker in other lights, gas man did too. Later i put a cup pf coffee in the microwave. It bogged down and was flickering along with other lights. I ran to the breaker box and could smell it was hot so opened one panel door but nothing going on there so opened the smaller box door and got a small cloud of smoke. By then gas tech is yelling about 911 and to run outside and call 911. I got around him and pulled out the mains then called the OH SH*T hot line. Nothing like seeing a big bruiser with an ax heading right at you. No big problem thankfully. The feed between the box's shorted out due to the outer sheath not inserted into clamp ring so vibrations from rail traffic 4 blocks away rubbed the inner wires bare. May post pic's of clamp and section of wire left by electric contractor. I've worked out of town all year, glad i was home.