Frames sequence extracted from the recently declassified video of the "Tesla" nuclear test, part of operation Teapot (Nevada, 1955). The weapon was placed on top of a 308ft tall tower (visible in the top-left frame). The high-speed camera was recording about 2400 frames per second.  The 'spikes' visible on the lower part of the expanding blastwave are due to the mooring cables being vaporized.