Pedzisa mutsara unotevera: Kuongorora tsaona huru dzinosanganisira nzvimbo dzakasiyana-siyana dzomunzanga kunoratidza kuti zvikanganiso zvisingaoneki ndizvo zvinonyanya kukanganisa kuchengeteka mumamiriro ezvinhu akaoma. Tsaona dzakadaro dzinosanganisira
Tsaona yeThree Mile Island, njodzi yeHeysel Stadium, njodzi yeBhopal, njodzi yeChernobyl, njodzi yeSpace Shuttle "Challenger", moto weKing's Cross, "Piper Alpha", uye MS "Herald of Free Enterprise".