In 2001 people found a super hidden secret in the original Super Mario Bros. On world 1-1 if you jump 3 times on the hidden/bonus warp pipe before going in it, it would turn brown. Once it turns brown, go in. Hurry, as you only have 3 seconds to get in once it turns brown. Once you're inside you'll be at this weird porch on the outside of a brown house. On the porch there would be this NPC. When you interact with this NPC it would say: "Tung Tung Tung Hello. I Am Tung Tung Tung Sahur. But You Can Tung Tung Tung Call Me 'Triple T'." Once that happens your game will reset and when you start it again, all the Goombas have been replaced by Triple T himself! This secret has been removed in future re-releases or remakes/remasters of Super Mario Bros.