Reddit has a subforum that is called PhotoshopBattles, and the name is pretty self-explanatory: users post pictures and ask other users to show off their Photoshop skills to create funny, viral pictures.
Users have edited the picture to achieve hilarious results: from Spirited Away inspired costumes to Sad Keanu Reeves meme reinterpretations.
You can find more funny responses to this thread on Reddit. What is really cool is that if you have some degree of Photoshop skills, you can even join in the fun and edit your own pictures to share them with the world.
Find the original thread here.