exploding cellphone batteries!!!

Tweet

recently it was in the news that millions ok nokia batteries of type BL-5C were over-heating and rarely even exploding.the batteries are being recalled in what would be the biggest product recall in mobile history.the reason being given is overheating due to short circuits. i also read about instances where two cellphones kept together caught fire and actually burnt down a house. have you guys experienced anything similar??? are these phones really explosive??