In 2004 the German company Heckler & Koch’s product catalog was released at an industry trade show. Unfortunately their photographer didn’t notice that their cartridges had been loaded backwards into the magazine.
This sparked a meme of sorts among HK enthusiasts where they would mimic the error stating that was infact the correct way for HK pistols.
Here’s two examples:
The best ads are the ones that still generate attention long after the first publication.