i'm sorry to hear about your dad, and will be praying for him. accidents happen so quick, 7 years ago i killed a buck, went in the next day to get my stand, lowered it to the ground, threw a couple of things down, while standing on the same limb i had stood on 20 times, snap and down i went. i pray there will be no more injuries, especially internal, and GODS hand will be on him. this should be a wake-up call to us all, it can happen to anyone of us.