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• n  a hammer driven by compressed air

• Perhaps it's that sensation of being crammed into a flying matchbox while a man inside your head uses a jackhammer to tunnel his way out.
• Peak dosimeter readings as high as 113 decibels roughly equivalent to the din of a chain saw or jackhammer came during the 7 a.
• In a pivoting stance, his hips swing sensuously from side to side and his entire body takes on a frantic quiver, as if he had swallowed a jackhammer.

• air hammer
• pneumatic hammer

News & Articles

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• FBI, cops in body hunt at Queens home of 'Goodfellas' mobster played by Robert De Niro
  Dennisthephotog.com UNDER-COVER OUTFIT: Feds armed with a jackhammer yesterday prepare to excavate the tent-covered driveway of late mobster Jimmy Burke in hopes of finding a body. Organized-crime investigators swooped in on the Queens home of James “Jimmy the Gent” Burke yesterday — digging for human remains in the driveway, back...
  June 18, 2013 - New York Post

Quotes

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• Mike Huckabee in CBS News
  ...of the Washington Independent reports that Huckabee, who headlined the event, told a friendly crowd Saturday evening, in reference to the United Nations, that "it's time to get a jackhammer and to simply chip off that part of New York City...
• John Zogby in Reuters
  When you think Congress is at rock bottom someone is there with a jackhammer,Zogby said.
• Steve Stricker in Los Angeles Times
  This was a good start,Stricker says, adding in a typical self-effacing summary, "but I did a couple of boneheaded things too. I three-putted from eight feet on one hole. There was a jackhammer going in the background and I just couldn't...