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If your hipbone is connected to your BlackBerry or your thighbone is connected to your cell phone, those vibrations you're feeling in the car, in your pajamas, in the shower, may be coming from your headbone.

Many mobile phone addicts and BlackBerry junkies report feeling vibrations when there are none, or feeling as if they're wearing a cell phone when they're not.

The first time it happened to Jonathan Zaback, a manager at the public relations company Burson-Marsteller, he was out with friends and showing off his new BlackBerry Curve.

Zaback, who said he keeps his BlackBerry by his bed while he sleeps, checks it if he gets up in the middle of the night and wakes to an alarm on the BlackBerry each day, said this didn't worry him.

Some users compare the feeling to a phantom limb, which Merriam-Webster's medical dictionary defines as "an often painful sensation of the presence of a limb that has been amputated."

 In certain circles, phantom vibrations are a point of pride.