They say necessity of the mother of invention and while it certainly plays a role in most good creations, there are others inventions that must have been borne from madness, arogance or just plain stupidity. TopTenz has compiled an excellent list of just such creations ranging from the car spittoon (above) to a Razr phone that is actually equipped with a working electric razor.
Of course, not everything that seems to be an immediate failure is actually worthless. TNT is on the list not because the invention was a failure, but because it was not very good at its initial purpose, which was to work as a yellow dye. Personally, I'm glad that didn't work out as I'd hate to be wearing a tee shirt that could explode at any given time.