That, dear BAtweeps, is a Giger Counter. It's an actual thing, built by my friend Steve D at Mad Art Lab, and he got the idea from an idle joke I recently tweeted. Seriously. Go read the whole story behind it, and be amazed at the creativity some folks have. And to know that something I wrote as a silly joke inspired someone enough that he turned it into an actual physical object - especially a pun! - is beyond awesome. I am honored.