It's like wrestling, if your both pulling against eachother and no one is moving, sometimes it's best to suddenly give in for a second. Causes the opponent pulling to loose center of gravity backwards. This causes a reflex in the opponent, that reflex is to catch that weight and redirect it toward you as not to fall backwards. When that moment occurs then you return to your original pull and bring your opponents weight with you back in your direction fully for a sweet pavement nap.