It all started when a bunch of police officers danced to 'Uptown Funk' and posted a video on Facebook. It went viral.
The video begins with a few cops dancing to the song. Soon, the entire battalion joins- and they lip-sync to it.
The video has now started a lip-sync battle.
Cops across the US are challenging various police departments to take up this lip-syncing challenge - and nobody is backing down from doing it.
This police department in San Fransico even brought their own mascot to accompany them while they jammed out to Bohemian Rhapsody.
**We do not own the rights to this song** pic.twitter.com/xF23pBKQcY
— CHP San Francisco (@CHPSanFrancisco) July 12, 2018
Someone speculates on how this challenge would be taken if it comes to India - and if it does, what the reactions could be like.