This was a series of tests involving a person who had a addiction to terraria.

Some of the studies involved people trying to beat his hours in terraria. At first the people aiming to pass the hours were fine, until they started feeling itchy. After the itch they started to cough often and soon after they said they "felt like someone is watching me." At this point most people stopped, if they didn't they experienced worse symptoms, if they persisted after this, they would loose the ability to breathe. There is almost no way to save someone after this happens.

the thing that you don’t have when you’re phones percentage is over 20