normally, ppl who run away from accident scene are normally becoz of tarak licence/road tax, not-the-owner of the car, drunk, carrying some illegal stuff inside, having illegal mod on the car, car/owner on the wanted list.
They know once the car is stopped by police, the driver and the car will be in trouble. This is why they would just run away.
Damn the myvi driver to hell. Irresponsible driver.