The Euthanasia Coaster is a hypothetical euthanasia machine designed as a roller coaster intended to kill its riders through prolonged cerebral hypoxia caused by extreme g-forces and inversions. It was conceived in 2010 by Lithuanian artist Julijonas Urbonas as a thought-provoking concept that blends the euphoria of an amusement park ride with the ethics of euthanasia.
https://en.wikipedia.org/wiki/Euthanasia_Coaster?wprov=sfti1#