The saying goes: "If you don't have something nice to say, say nothing at all." And that's precisely the message in a viral anti-bullying video created by a teenager in California.
It's a silent video - but it speaks volumes.
15-year-old Lindsey Hunter, the creator of the film, is bringing hundreds of thousands of people to tears - both sad, and happy.
It's called "Silent" because the student who is bullied is deaf.
The realization moment is just as powerful as one of the bullies realizes the impact of her actions and finds a way to apologize.
Lindsey says she has spent most of her life around disabled people. In fact, her father is blind.
She says when she described the video to him, scene by scene, he too was brought to tears.
Teenager creates powerful, 'Silent' anti-bullying viral video