Nightshades was a product by Paul Harris marketed around 1993 in which a pen is slid across the face of a dollar bill, causing a pair of sunglasses you just drew on George Washington's face to flip up off his eyes and onto his forehead.
An impromptu version was later published is "Improv Nightshades" in Art of Astonishment Vol 1.
Ultra Visual Nightshades by Mark Allen was released as a "Paul Harris Presents" product (2007). It allowed for the glasses to move without any cover with just a little shake.
An improved version of the pen, along with routine "Bulldog Nightshades", was released on Harris' True Astonishment series DVD #9.
- "Let George Do It" (a presentation for Paul Harris' NightShades) in the "Little Egypt Gazette: Lecture '96" by Steve Bryant (1996)