Introduction You cannot view this unit as you're not logged in yet. 1 thought on “Introduction” 01:37 How would you be an effective TPI (Third Party Intervenor) here? 02:20 convulsive grip generating 90 degree orientation of knife to forearm triggering long wide stabbing motions with the arm. Ideal for Dog Catcher entry. Log in to Reply Leave a Comment Cancel replyYou must be logged in to post a comment.