While meme historians peg the practice to a 2018 post from a New Zealand police Twitter account, it caught fire this month after first responders in Switzerland gave life to #tetrischallenge by laying out traffic cones, fire extinguishers — and themselves.
More first responders worldwide later joined in on the fun.
But a few military contributions helped propel the meme, offering a rare glimpse into the equipment they carry into battle.
The Tetris Challenge is the latest craze to catch on with service members.
Photoshopped giant cats on aircraft carriers, nestled on tanks and lounging on the Pentagon were a big and bewildering hit when they appeared on social media and published by an unknown guy named Thomas in Western Europe.
This post has been updated.