suppermariobroth:

In Super Mario Land, a glitch can be exploited in levels 2-3 and 4-3 to make Mario invulnerable. If a block that is about to push Mario off-screen is destroyed at the last possible moment so that only 2 pixels of Mario’s vehicle are visible on the left side of the screen, enemies will not be able to harm Mario as long as he only moves up or down in this state. (Footage recorded by me in a GB emulator.)