1.   Cell-phone signals can cause the chairs to stop or wheel out of control, reports the Earth Island Journal.

2.   If an elderly person is injured and presses the emergency button, the signal causes the phone to dial a monitoring station.

3.   If the rays get too harsh, the electric signal causes the lenses to change hues.

4.   In a handful of states where Nextel signals are causing interference, other wireless companies also have contributed to the problem.

5.   Experts are being called to determine if phone signals could have caused the electronic circuits to malfunction.

6.   Police said a defective signal apparently caused the freight train to stop.

7.   The wrong signal caused a northbound passenger train to plow into another train stopped at Rongjiawan station, in Hunan.

8.   He said that a wrong signal caused the two trains to come on the same track.