#SmackCam is a meme on Vine that has escalated to an alarming level.
The concept is to slap an unsuspecting person in the face and upload it tagged #Smackcam.
But as Jezebel points out, teenage boys have been using it as an excuse to hurt teenage girls.
(UPDATE: The above video was apparently staged.)
In the Vine below, two boys slap a girl repeatedly until she starts to cry.
In this one, a boy lights another boy's face on fire.
And this guy decided to use a power drill with a plastic hand attached.
The tag, according to Twitter, has thousands of videos already uploaded to it.
Most of them not particularly alarming.
In this one a little girl slaps her brother with baby powder.
Still, most people have agreed that the joke has spiraled out of control.
Ryan Broderick is a reporter for BuzzFeed News and is based in London.
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