Sgt. JD Nelson from the Alameda County Sheriff's Department tells ABC, hosts Jamie Hyneman and Adam Savage were trying to figure out how effective a cannon is at firing non-cannonball objects
The cannonball was supposed to land harmlessly in a nearby hill — but something went wrong
The Discovery Channel show has been put on hold after the mishap, pending a full investigation. Luckily, no one was injured."
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