Mini Golf Ball Cannons - When Lab Assistants Plot

So what was I up to?  Well there IS a Blogville rodeo coming up and I was thinking that we need to have a really rousing way to start the festivities.
It's a mini golf ball cannon.

You just need a few spare parts from the shed, garage, or evil laboratory and perhaps a friend or relative to divide the blame fun. And a golf ball.

The golf ball is essential.
Now I'm not going to explain how to