Some cool art found in Super mario Bros 3
(http://a.disquscdn.com/get?url=http%3A%2F%2Fi.kinja-img.com%2Fgawker-media%2Fimage%2Fupload%2Fs--Oaey2P1h--%2Fc_fit%2Cf_auto%2Cfl_progressive%2Cq_80%2Cw_320%2Fke8isu05ozqbkwktxzre.gif&key=FgmZxofRumu10TlY8GDHhw&w=800&h=280)
http://www.coveragemail.com/technology/rare-animation-from-nes-video-game-super-mario-bros-3-reportedly-surfaces-online/
I don't think that art is actually in the game, I think that's a fan creation. What they were referring to is an animation in case you ever picked up the Hammer Bros suit while on a slope, there's a slide animation. All I can really think is "how Clickbait can you get that you tell people this and not link it?" Someone in the comments had to link to the actual animation.
fixed and thanks