Ladies and gentlemen, you are looking at an E-meter. It measures the thetans in your system. Any intelligent person knows that thetans are frozen and brainwashed alien souls sent to this planet by the evil emperor Lord Xenu and implanted into your body to cause all of your fears and misgivings.
If Xenu didn't exist, the e-meters wouldn't move, because there are no thetans, but check this out!
This is actor John Travolta working the e-meter like his life depends on it, and getting accurate thetan readings!
This is overwhelmingly obvious evidence that thetans and Xenu exist and play a very pivotal role in our lives. The next time you see a person on the street asking you to take a free stress test, don't just shun them off to the side, think about what they have to say.
Make sure you bring your credit cards as well.