Jon drops the rock. Again.

Jon was getting very nervous. He hadn't anticipated such a mild wish could cause such far reaching changes, and to have Sarah McMillan of all people discover the wishing stone's existence was too much. So when Sarah made a sudden lunge for the stone, his fingers were so slick with sweat that he dropped it almost instantly. "No!" He and Karyn cried in unison, as they and Sarah both made a dive for the rock.