This is always a classic. Everyone has turned off the lights once in their life and rushed to another room as if there was something, or someone behind them..

You're a 19 year old student. And, you were in the kitchen to make yourself coffee. You decided to go back upstairs to your room after doing it, but you had to close the lights.. You did, and started running towards your room. When you completed the marathon, a presence was standing right behind you..