Doberman Attack

A huge doberman charged to me. I stood my ground. He turned back in about 5 feet. Then that SOB turned back and tried again. He came closer this time and sniffed on my balls. I was telling myself "if that SOB bites you, kill him...". I had a nice conversation with the owner later. I told him that I am a veteran martial artist (a duelist). If that dog jumps or turn his head in a biting position, I would make my move... Dogs are gangsters. Alone, they are not very capable and brave. If they are two or more, I would have been in big trouble. Two days later, I went to train to re-access my abilities to see if I was just delusional or whether I was really capable to kill that doberman... Been away from training for almost two weeks.