There was an rock. An amazing rock. No, not just 'amazing', it was fantastic! It was the rockiest rock you had ever seen. NO, the rockiest rock that anyone had ever seen. When you think of rocks, you would think of this rock -- well you would if you could because only someone who had actually seen this rock could really fully grasp the true nature of "rock". Yes, it wasn't just a rock. It was The Rock. No, more than even that, it was just ROCK. Period.
And if you might wonder how this rock came to be there was this geologist... And this geologist loved rocks. Loved, loved, loved! And even though he was a great geologist, he often failed at his job because instead of evaluating water tables and groundrock stability, he would end up focussing on the most interesting rocks that he could find at whatever site he was working at. And after a while, he lost his job, and he couldn't get another one, so he lost his apartment, so he ended up setting up his tent at excavation sites in order to examine the rocks that were dug up, until one day a backhoe operator failed to see the geologist sticking his head in the trench the operator was digging, and so geologist died due to the backhoe crushing his head in as it came in for the next scoop. But he died happy because he was looking a really interesting rock, a real schisty specimen.
And then, there's a bit about the geologist waking up in front of a god and asking to be reincarnated as a rock.
And so the rockiest rock, ROCK came to be.