Super Mario Bros. 3 Glitches

Pipe Glitch
You need to go to World 3-9 to perform the glitch. At the end of the first area, there is a pipe surrounded by Ice Blocks. Get rid of the ones on the left to gain access to the pipe, and then get rid of the bottom three Ice Blocks on the right-hand side of the pipe, leaving the one on the top. Now stand where the blocks used to be, and duck, then jump. You'll go down a black and red object on the side of the pipe and won't be able to get out of the pipe. If you are Fire Mario, you can still shoot fireballs, but the only way to get out of the pipe is to wait 5 minutes after the timer runs out.