Fast food companies spend years inventing and testing new menu items.

But even with fastidious planning, things can still go horribly wrong.

Look no further than McDonald's McAfrika, which was essentially a burger on a pita. The item was released during massive famines in Africa and was pulled after public outcry.

There are also items that are bizarre, out of place, or just plain gross.

Kim Bhasin contributed to this story.