241543903 (a.k.a “Heads in Freezers”) is a numerical keyword associated with a photo meme that involves people taking pictures with their heads in the freezer & sharing them online. By tagging a series of image files with a cryptic number, a high level of search engine optimization can be easily achieved. As a result, typing “241543903” into image search engines like Google Images successfully yields pages after pages of pictures showing people’s heads in freezers.
In 2009, David Horvitz started the “Heads in Freezers” meme. Participants took photos of their heads in freezers, tagged them with “241543903” and uploaded them to social media sites like Tumblr.

Shironeko, also known as “Basket Cat”, is a Turkish van cat called “Shiro”, which is best known for his extremely relaxed demeanor and ability to balance things on his head, similar to Oolong the Pancake Bunny. The cat has been given several nicknames by its fans, most notably “Basket Cat” and “Zen Cat.”

A participant runs towards the waters of the North Sea during the annual New Year's plunge event in Ostend, Belgium, January 2, 2016. (Photo by Francois Lenoir/Reuters)

UK “Ex On The Beach” star Ashley Cain celebrates his birthday with girlfriend and ex “Big Brother” star Chloe Khan at Gallery Nightclub in Maidstone, England, UK on September 25, 2016. (Photo by FameFlynet UK)

Miranda Kerr going back to her hotel during Paris fashion week Paris,France on October 04th 2016. (Photo by KCS Presse/Splash News and Pictures)

Kendall Jenner seen at Universal, NBC, Focus Features, E! Entertainment Golden Globes After Party Sponsored by Chrysler on Sunday, January 8, 2017, in Beverly Hills, Calif. (Photo by Eric Charbonneau/Invision for Focus Features/AP Images)

Actor Chantel Jeffries attends the 2018 Billboard Music Awards at MGM Grand Garden Arena on May 20, 2018 in Las Vegas, Nevada. (Photo by Steve Marcus/Reuters)

Actress Olivia Munn attends the 2018 MTV Movie And TV Awards at Barker Hangar on June 16, 2018 in Santa Monica, California. (Photo by Mario Anzuoni/Reuters)