Man, I am SO sorry. I've seen my share of ugly MTB injuries but this one is right up there. (Friend impaled a calf with a brake lever last year, but the end had broken off the lever previously, so it was sharp. Yours obviously still had the knob on the end.) That looks like it really really hurt. Heal up, brother.
PS: If you are now prejudiced against those Hope brakes, I will take them off your hands. (Oops, poor phrasing, perhaps.)