SD Toyz brings you the most fun you can have with a pull-back engine racer ever with Knuckle Headz Head Poppin' Racers! Knuckle Headz combine the fun of a fast and furious pull back race car with the crazy action of a demolition derby for all out racing mayhem! Knuckle Headz feature a crazy driver who is ready to lose their head to win the race! Push down the driver's head and pull the car back along any hard, flat surface; let go to see your car fly across the room! Then get ready for the Poppin' Action - a square hit to the front of the car and the driver's head will fly into the sky! See how straight you can point the car so it will hit its target or set up your own ramp for daredevil demolition stunts. Add a second car so that you can race and crash with your friends, too!