I'm too lazy to find my actual code but here's the gist:

C# but might working in Java/etc too *

Create an Image of some size

loop hight of image

   loop width of image

      Bitmap b = cast Image to bitmap since Image doesn't have the pixel method

      get pixel value or whatever looks legit 

   end

This creates a new bitmap for EVERY pixel in the image. If the image is large enough and the system is 64 bit bad things happen. On Lubuntu this code burned through 8 GB of ram in seconds and was well on its way to eating all the virtual memory before I forcefully shut it off.

Maybe this is a Linux issue but it hard locked my system. I couldn't switch to a different terminal or anything.