At first I assumed that this discussion of the Master Violet Ray at Irrational Games must have been the start of an ARG for Bioshock Infinite:
Marketed in the early 20th century as a miracle device cure for just about any ailment, the Violet Ray is little more than a handle that powers a glass tube attachment filled with neon, argon, or helium. Touching a powered Violet Ray creates a tingling sensation whose intensity can be increased with a power dial.But apparently it's a real device. There are several on sale at eBay.
