You can read our review of Dying Light to get caught up on the parkour-slash-zombie title, and we've also played through a chunk of the game in virtual reality. The latest weirdness comes from YouTuber Alex Noon, who has found a very strange recreation of Super Mario Bros. world 1-1 in the game.
Watch the video to learn how to access the content, and then go find it for yourself. You need to be about halfway through the game to find the level, but it's certainly worth the effort if only for the strangeness of the experience. Don't stop there, though, you can also find a Last of Us Easter Egg.
And we've already covered the Destiny joke. This short list seems to be only the beginning of the gaming humor to be found in the game. Let us know if you find anything else!