Ever since I can remember, if anything happened like getting really mad, or in a confrontation, I just black out.

And I wake up usually on top of the person hurting them, OR finishing off a sentence.

For example: When I was in 4th grade, I had a really mean teacher, that ruled with an iron fist. One day I was sitting at my desk playing with my pencils, cause that's what I did, and the teacher was currently beating a kids head up against a wall and screaming in his ear. Keep in mind this is normal to me.

Next thing I know I'm standing in front of her and finishing off a sentence. The other kid is curled up against the wall, terrified. She's sitting in the chair looking at me puzzled, and then looks at me and says "hmmm?" as if I have anything else to say.

That's when I shrug and just go back to my desk to go back to work.

There are many more instances like this, and I'm not sure what's happening. Am I crazy? Do I have a multiple personality? Help