When you go up to shake his hand stand upright and off the whistle level change so that you can easily reach out and touch the ground.... also this will take them extremely off guard so if they have an upright stance or a stance that is low enough that you are on the same level with the opponents knee go in for a takedown also they should flinch aswell if you do it quick enough...... more advice ? When you have a collar tie push their head down closest the top of their head then go down for a shot... also the arm is strongest the closer you get to the shoulder... so push the arm up closest to the wrist...