I don't know why they call this a mystery shirt, I could have predicted they were going to sell this today. Seriously, I wish I had written this update about two hours ago when I just got that feeling.
If mystery, suspense and/or surprise are your thing, definitely give Uneetee's mystery tee a try. Just don't buy more than one, unless you're also getting something for a cherished friend or loved one, because it looks like this mystery is just a single design.
You can also take your hard earned greenbacks and pick up World Circuit by Daniel Gilbert, a person who believes in the connected universe.