I have been privileged to experience one of the fabled e-meters.
It's a fairly simple skin galvanometer. The bloke who was carefully asking me questions and reading the meter's responses, testing to make sure that sorry, 'whether' I needed Dianetics in my life gave up when I looked him in the eye and started rapidly squeezing and relaxing my hands, making the needle swing wildly all over the place, and asked him "So what does this say about my personality?"

Unfortunately he had a response. My piss taking was a sign that I was a troubled individual who needed order in my life. This book will help show you how. It's only £14.99, on special because we want to help you.
(Falstaff's Spiritual Successor, Tue 6 Apr 2010, 14:30, Reply)