The day I learned in practice the cardinal rule of using a knife, I was trying to remove a rubbery substance known as semicon from the insulation of high voltage cable. This is usually done with a pair of pump pliers, but sometimes the stuff is stubborn and is hard to get started. We have in our tool bags wood handle square tip straight blades I think are leather workers knives. They are crome vanadium and are often wicked sharp. I thought I could pry the blade in between the semicon and the insulation to get enough to get it started. I was pushing straight toward my other hand. Wouldn't you know the blade slipped and I literally caught it with my fingers on my left hand. The straight blade landed squarely across the inside of all four of my fingers between the bottom nuckle and the middle. It made an eerie "pfft" noise much like a sound effect you would hear in a movie. I didn't feel much, just a feeling that the blade had slapped my skin. I quickly pulled my hand up and staired at it for what seemed like second all the while hoping it wouldn't bleed. Wouldn't you know it, it did. Blood came oozing out simultaneously from all four fingers just as pretty as can be. Blood doesn't bother me, in fact all I said was "damn I cut my fingers" and proceed to climb out of the manhole to doctor my self. When I got to the top, I about fainted. Believe me, I'm not a sheeple, I just think there is a sudden blood pressure change that your body has to adjust to. I've had that reaction a couple of other times, and it isn't due to seeing blood. I could really care less other than it is going to be a pain in the butt letting it heal for the next couple of weeks. But for some reason, I get faint and have to sit down when I really cut or jab myself.