Police and other public safety disciplines are participating in a new social media challenge—one that shows all the things that are jammed into their patrol vehicles.

On Facebook, Instagram, and Twitter, people are posting pictures of themselves with all of their things—from DJs with their records, speakers, and turntables to families packing for vacation next to their minivans—and adding the hashtag #TetrisChallenge. The Dutch budget airline Transavia event took all of the seats and cabin contents out of a plane for a photo.

The challenge is popular with ambulance crews and fire fighters, particularly in Europe.

Now, police in America are beginning to get into the mix.

The California Highway Patrol West Valley Division posted a picture to Facebook of a squad car, two officers, and all the items they manage to jam into their vehicle. The image had the caption, "People are always asking us what’s inside our patrol cars. What better way to show you than to take on the #TetrisChallenge—Look up this hashtag on Instagram to see similar pictures from agencies all over the world! Shout out to our graveyard crew for this great picture! What’s in your ride?"