I thought my ex was the kindest, calmest man I've ever met. It was what attracted me to him after so many of my ex's had turned out to be abusive. My friends even made a joke before about how if someone broke into my house he would probably hide behind me and let me fight off the criminal.

A couple of weeks ago we were walking home from a friend's house late at night and we stopped by a post box to post a letter. A man came up to us and started asking my fiance "Why did you post a letter? Who is it for?" Over and over again. He was obviously on some kind of drugs. We tried ignoring him and this man became more and more aggressive and started to follow us obsessing over this letter we posted.

The next thing I know is this man pushes me from behind and starts shouting at me asking me why my fiance is ignoring him. And he pulls a small pocket knife out and starts walking towards me again.

It was like a switch flipped inside of my fiance's head and he just went crazy attacking this man. He got the man on the floor and was hitting him over and over again. The man kept struggling and my fiance ended up biting the man's face. It was horrendous. I just stood there screaming and begging him to stop.

I know he defended me but honestly he could of stopped after the second punch. The amount of violence and how ferocious he became it was like a wild animal. I've seen it with some of my ex's and in other men. This switch that turns off in there head and they are capable of horrific violence in the drop of a hat. The amount of control he lost. Afterwards even he just had this look in his eyes like he was possessed. He was in so much of this animal state he didn't realize the man had stabbed him in his side.

Luckily the hospital was just around the corner and he ended up being fine. He started crying so hard afterwards and after we got to the hospital I just left him there and went home without saying anything, I think I was in shock. I had to do alot of thinking that night but came to a conclusion. I am not safe with him. The complete loss of control, the horrible amount of violence I saw he is capable of when he loses control. He is not the man I thought he was. One day what if he loses control on me. And it's not just him. It's every man. They are all capable of flicking a switch in there head and hurting you without any hesitation. I knew even though that night he protected me. In the future he could use this switch against me and not even realise until it's to late. My life is worth more than any man.