Crazy, weird and possibly useful inventions

There have been many modifications to some of the first and most popular inventions. Like the wheel for example. It started out so simple and now there are so many different types and uses and styles and so many different wheels, I could write a lens just on them alone if I wanted to. Cavemen came up with the first model, to help them move heavy things. In later days they were used on horse carriages, carts and all kinds of stuff. Today you can see them everywhere, on cars, trucks, tractors, bikes, and planes. Everywhere you go you are likely to see or be using some type of wheel.

So let's say you have an invention idea your self. What do you do? Where do you start?
There are lot's of resources online to help new inventors but make sure you are not submitting your great ideas to any fraudulent companies.
The Inventors Assistance League would be a good place to start.
For just a simple place to get some info you can visit www.inventions.com. You can find out about patents and other important stuff like that.
Whatever you do, again be careful of who you submit or share your ideas with. Make sure you get a patent as soon as possible. You don't want your invention to be stolen.

So we know Japan can come up with some weird and crazy inventions. Now what about the rest of the world. Let's look at some of the weirdes and craziest inventions ever thought of. And you can help me decide if any of them may be useful.