You can use grabbing with the shift key! you can use it to grab onto bosses that fly such as a dragon, where you can hold on to it as it fly's. the enemy / boss would try to knock you off. you simply press a key to doge its attacks. you can grab onto vehicles, my lander (another idea) and you can grab onto ledges to climb up, and avoid falling. this would be so help full in parkour maps and / or playing normal so that you don't die from a big leap that goes wrong resulting in your death.