Demolition Spectators Injured by Flying Shrapnel

Implosion at a California power plant partially amputated one man's leg and injured several others.
3:00 | 08/05/13

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Transcript for Demolition Spectators Injured by Flying Shrapnel
We'll turn to the power plant implosion that sent shrapnel flying into a crowd of spectators. It left one man with a partially amputated leg. Several others injured. Abc's john muller has the story. Reporter: The implosion begins routinely enough with crowds gathering and counting down. Five, four, three, two with -- but as the explosive charges begin firing, shrapnel begins flying. Listen as it slams into this fence. Oh, my god. Reporter: From this angle you can see what appear to be large chunks of metal rocketing out from the power plant. Hundreds of people are gathered to watch in a so-called safe zone 1,000 feet away when things went wrong. Unbelievable. Oh, my god. Reporter: One man was hit so badly his leg had to be amputated. Four others including fred garten were also hurt. It felt like a piece of metal hit me like getting hit with a baseball bat right below the knee. Reporter: In recent years building demolitions, implosions and explosions have become something of a spectator sport. It goes. Oh. Reporter: Yet accidents like this one are relatively uncommon. This morning, pacific gas and electric company which owns the plant is investigating. It says it now believes the safety zone may not have been large enough. In a statement the company said it is working closely with, quote, all investigating agencies and third-party contractors to identify what caused this to end like this." Now, the man who lost part of his leg continues a serious battle in the hospital. One thing investigators will focus on, how did experts come up with 1,000 feet as the distance considered safe. For now police have no plans to file any criminal charges.

This transcript has been automatically generated and may not be 100% accurate.

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