A Warning

When my great grandfather was a little boy, he used to bring his uncle lunch in the afternoons. His uncle worked in a silver mine on their property, so each day, he would bring it down into the mine. One day, when my great grandfather was bringing lunch, his uncle came out of the mine and told him not to go in. He said okay and left. Later that day, my great grandfather found out that there had been an explosion in the mine, and by the time his uncle had told him not to come in, he was already dead.