Infinite lives
From Glitches
From the game Super Mario Bros. for the NES.
In level 3-1, you can get an infinite number of lives by jumping on koopas. Use one koopa, and make it so it is hanging off of the edge of a step. Go on the step where the turtle shell is hanging and jump up. You will continuously hit the turtle shell to gain many lives. If you have over 128 lives and die, you will get a game over screen.
Submitted by: andrew gardikis