Throwing cards as deadly weapons seems impossible. When done correctly little bits of cut-out cardboard suddenly becoming capable of piercing hard fruit, drywall, or even a brown paper lawn bag is beyond the believable unless you are open to anything you’ve seen on TV.
Of course if you follow this guide and get someone in the eye or something, I don’t want any emails about kicking my butt or taking me to court… not again… not after last time…