I noticed last week that my gfi breaker had been tripped at my kitchen outlet. Well, I reset it and didn't think any more of it. But tonight my wife said she heard a buzzing noise coming from the same outlet and then smoke came out of it and the gfi breaker tripped again. I know absolutely nothing about electricity and know I will have to call an electrician, but any ideas on what is wrong here? It is only this one outlet and nothing is plugged into it.