Mushroom Clouds. http://www.youtube.com/watch?v=ssLZ4bUTDYM Stolen from wikipedia: Storax Sedan was a shallow underground nuclear test conducted in Area 10 of Yucca Flat at the Nevada Test Site on 6 July 1962 as part of Operation Plowshare, a program to investigate the use of nuclear weapons for mining, cratering, and other civilian purposes
