In a seperate dimention, One thought of death and you die. Even considering saying the word, and you die.
Jonas is a child who, since birth, has nerver thought about death, till one day during his science class, one of his friends' die.
Now, he thinks of death, and, he doesn't die. In fact, the person he is looking at dies. After testing this a few more times, Jonas comes to the conclusion.
If he thinks of death while watching somebody, that person dies.
I might actually do this one...