This image is infamous among a very small circle of Belgian competition puzzlers.
We have a 24-hour puzzle competition each year where teams of 4 people try to assemble as many puzzles as they can in 24 hours. This is sponsored by Jumbo and the puzzles are part of their new collection, so they're new to everyone.
The puzzles become gradually more difficult and usually the first one is 1000 pieces and kind of a fun or interesting one from the collection.
Well, one year the first puzzle of the competition was this image. And it looked a little challenging-but-fun because it was black and white, but it ended up being near-impossible.
As in, most teams spent all 24 hours on this one puzzle and we not even close to finishing it.
So the years after that they introduced a "skip" option, where a puzzle can be skipped, with a point penalty. But the image is still haunting to us who took part in the competition that year.