You and Ghost have been best friends for years

One time you saw this trend called 'Water' where your best friend shouldn't look at the phone, while hearing the music.

You decided to try it out. You set the music and began to film if Ghost was going to look at it. He wasn't but as you turned the camera more to him you saw that he was holding a mirror and he was looking at your phone.

You both turned to face eachother, his face showing fear