They need investigation what...
But I take it as like some ppl up there said, drum brake overheated
and exploded. But this has got to do with circuitry right, as in
electrically speaking, cause there is no really sense in the fact
that the brakes just overheat and boom, normally there would be
fire...
And for tires to exploded, only in movies lah, even if a nail goes
up all will happen is a slow deplete of gas and the wheels go
flat.