More important, they found that a shock wave developed on the blades of the rotor.

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Some market observers say it is unlikely the Netherlands will impose losses on senior bondholders, because that could send a shock wave through the European banking sector.

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The sacking of Hansie Cronje as South African captain three years ago and his subsequent admissions that he accepted money from bookmakers sent a shock wave through the cricket world.

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Lt Col Colin Weir, commanding officer of the 1st Battalion, said his death had "sent a wave of shock and sadness through this battlegroup".

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But two recent studies, including one in the prestigious Journal of the American Medical Association and one in the British Medical Journal, found that heel patients who received shock wave therapy did no better than patients who received a fake treatment.

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These waves travel at the speed of sound, but when a jet travels at Mach 1 and above these waves merge into one single shock wave as they cannot get out of the way of each other quickly enough.

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But Harvard orthopedic surgeon George Theodore, who helped conduct the Dornier study, claims that the failed studies are flawed because they used low-energy shock-wave pulses that were below the threshold needed to have a heel-healing effect, unlike the successful FDA studies that used higher energies.

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