In her haste to get to her class, Karyn didn't notice that she dropped the stone when she ran into Sarah.
Now, as she picked up her stuff from the ground, Sarah noticed it. She picked it up, wondering where it came from, but then just assumed that it was a stone that got kicked onto the sidewalk. So, she tossed it into the grass and went to class, not realizing that she threw away the most powerful item in the world.
