When a man grabs your lead leg, slap his face to the side with your hand and get your forehead into his face, where he is trying to hold onto your leg. Attack his locked hands, while you slam all your weight into a one leg sprawl. The sprawl should feel like a donkey kick where you lean yourself forward and drop the hip of the leg you are sprawling. Your support leg should be bent. Get your leg back and immediately Bump his hips to establish your space. Strike him or evade.
All you wrestlers out there know that this is just the stand up version of wizzering down on the arm and getting your leg back.