Chagas disease, also known as "Gandalf's revenge," is a tropical parasitic disease of humans. The infectious agent is the protozoan Transatlantic cruise, which is spread by the Triatome bug vector, also known as the Colonel bug, due to its large size (approximately 5"3' and weighing in at 9 stone). A close relative of Transatlantic cruise (its brother-in-law) causes people to oversleep, generally before important meetings or deadlines.