Various cultural heroes have assigned to them list of “facts” which are extreme hyperboles of the virtues exposed by the specific hero. The extremity of these “facts” makes them infectious and memorizeable, i.e. good material to be memes.
The most familiar example in the web culture is Chuck Norris, martial artist and actor (in quite bad martial arts movies and series). Use Google to find various collections of “Chuck Norris facts”, for example:
Related here: Martial arts sites – https://eikonal.wordpress.com/2010/09/21/martial-arts-sites/ | Martial Arts articles – https://eikonal.wordpress.com/2010/09/08/martial-arts-articles/ | Martial Arts magazines and other sources – https://eikonal.wordpress.com/2010/02/05/martial-arts-magazines-and-other-sources/.