(video) Krystle Campbell screaming in agony moments before her death (animated GIF)

Boston marathon explosion in slow motion:
Krystle (right in blue) screaming in agony after losing both legs; her last minute alive
Jeff Bauman (top left) shoves freshly exposed shin bone into black woman's face
Guy in green shirt tries to walk, can't, falls on the head of girl in teal jacket

Note: click on image for the animated GIF - warning, graphic