First of all - it was a quarry. There's a difference.

As for why...

_{[ He paused, as if suddenly unsure how to continue there. He gave a sort of half shrug, but no matter how he said it, looking back now it was foolish. But then, he had been twelve so maybe it was a bit more forgiveable. ]}

My brother had been accusing me of being a goody two shoes all the time. The good little boy who always did what he was told. I wanted - needed - to prove him wrong, so I swiped the car.