John Cena green screen memes are peak internet absurdity. The magic comes from slapping his floating, flexing body into any random scene you can imagine. He can be fighting a bear, dancing at a wedding, or just awkwardly standing in a historical documentary.
The key is the transparency of the green screen effect itself. It looks cheap and hilarious on purpose. You can drop him into a serious movie scene or a boring office meeting, and it instantly becomes comedy gold. Grab the PNG and let your imagination run wild.