An unfortunate incident in Goiania, Brazil in September 1987 illustrates the hazards of cesium-137, a fission product. Two people stole a radiotherapy source from a disused medical clinic. A security guard did not show up to work that day; he went instead to the cinema to see ‘Herbie Goes Bananas‘. The radiotherapy source contained 93 grams of cesium-137. It was sold to a junkyard dealer. Many people were exposed to the radioactive cesium and they spread the contamination to other sites within and beyond the town. At least four people died from exposure to the radiation source and, according to the IAEA, “many others” suffered radiation injuries. Those injured included eight patients who required surgical debridments, amputation of the digital extremities and plastic skin grafts. The incident was rated Level 5 (‘Accident with Off Site Risk’) on the 7-point International Nuclear Event Scale.