Apparently, the original "Super Mario Bros." has way more levels than 32 or so. It has hundreds of them! Those levels are hidden away in every cartridge that is gathering dust in the boxes at our homes. They also weren’t intended to be found as they are “broken” and messed up. For example, there are enemies that have no place within them, like a Goomba underwater…
However, some Nintendo enthusiasts have cracked the process and were able to unlock these hidden levels. Here is how you can do it.
 

You will wish you had known this hack sooner as you’ve probably been cutting pineapple wrong your whole life.

This simple process will give you the key to getting into almost any computer admin account. Works with Windows OS.

That's quite simple, you just need to remove the polarized layer from your computer screen and use new polarized sheets to make polarized glasses out of 3D glasses for example.
Only the person wearing the special glasses can see what's on screen, others will just see a blank monitor.

Better try that first on a used monitor you don't care about though...