Scientology's $5,000 E-meters are surprisingly well-engineered
by Cory Doctorow from on (#3V6P9)
https://www.youtube.com/watch?v=KGBPn9arfVo
The E-meter is a quack device used by Scientologists in a religious ritual called "auditing" in which changes in skin potential are said to indicate past traumas (including traumas from past lives) being re-experienced and cleared from your psyche. (more")