I jumped over the flagpole once in 1-1 in the original Super Mario Bros thanks to a Game Genie code. Once you walk past the pipe that's the entrance to 1-2, you

I jumped over the flagpole once in 1-1 in the original Super Mario Bros thanks to a Game Genie code. Once you walk past the pipe that's the entrance to 1-2, you see about two more screens that then repeat forever. There are some places in The Lost Levels where you're meant to be able to jump over it. I believe that one had a warp pipe that took you BACK in the game.