Abstract: A unique drive mechanism for a toy vehicle is disclosed which can be selectively enabled to cause the toy to come to an abrupt halt after a powered run, and which can cause the toy to realistically imitate a "spin out" of a full scale vehicle. The drive train includes a first gear directly rotated by a coiled spring, a second gear coupled in driving engagement with the vehicle's wheels, and a third gear shiftable between an engaged position coupling the first and second gears, and a cleared position wherein the second gear can rotate independently of the first gear. The third gear can be locked in its engaged position by a pivotal, gravity biased locking mechanism. The selective, locked engagement of the first, second and third gears causes the vehicle to come to an abrupt halt after the coil spring has fully unwound at the completion of a powered run.