Summary: In this video clip, see why an explosion three miles above Earth would act like a white-hot tornado on the surface. Watch NOVA every Wednesday night on PBS. Or join us online at pbs.org/nova. Funding for NOVA is provided by ExxonMobil, Pacific Life, David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, and public television viewers. To learn more, visit http://www.pbs.org/nova/clovis
