The 241543903 meme, better known as 'Heads in Freezers,' began in April 2009 when artist David Horvitz posted a photo of himself with his head in a freezer to his Flickr account. He instructed his followers to take similar photos and tag them with the specific digit '241543903,' ensuring that a Google search for the number would yield a gallery of bizarre, identical actions. The number itself was a combination of his freezer's serial number and a barcode from a bag of edamame. This experiment became one of the first examples of search engine optimization as performance art, turning a random string of numbers into a global phenomenon that still baffles and amuses the internet today.