Okay, really, one last shot for the day. This time I turn the camera around and shoot myself in the eye. Really, My eye is about an inch from the marble here, and the camera's not much further than that itself. Camera's in my right hand, marble's in my left, and I'm checking the composition using my car's rear-view mirror.
Cliché, but it came out much more interestingly than I expected.
If you haven't lost your marbles yet, they're fun to play with!