Lol that would be me, the thing is though from my viewpoint it was actually going into his leg but because he had his leg slightly raised it ended up looking that way from the front. I can assure you its just the angle of the photo haha
Sorry I can't really make a tutorial for them, as I said they are self-made meaning made by the wearer, I only made my own costume! Plus the fact most people won't tell you an exact tutorial as its often too difficult to explain. I can't really explain how I made mine, it was very much trial and error half the time. All I can say is I based it off of a sewing pattern but changed a lot of it. Then added the blood stains etc.