
The so-called Tetris Challenge started September 1 when Zurich police published this bird's eye image on social media. It captured two officers on the ground beside the contents of their car laid out in neat, geometric block patterns, like in the popular 1980s video game Tetris. Since then, public services units from around the world have followed suit, photographing their work equipment in rows beside their vehicles. Click through to see more.

Taiwanese police from Taichung City lay out the equipment used to perform their daily public safety services.

The Himberg Fire Department in Austria displays all the technology and individual parts that go into its fire truck.

The Royal Netherlands Army shared this image for the #TetrisChallenge.

Hungarian police display a patrol car and its contents.

The Singapore Army shared this photo, which shows training aids and other ambulance equipment.

New Zealand police posted this image in reply to a Twitter user's request for them to join in on the #TetrisChallenge.

The Geneva Fire and Rescue Service in Switzerland shared a photo showcasing its fire truck and the crew and equipment it carries.