The gravel of the path shifted unpredictably under his crutch and his peg.

To keep power from shifting unpredictably to unpredictable Livers.

And if it happened close to the leading edge of a glacier, which shifted unpredictably, a sudden freeze could preserve the mammoth for millennia.

As the wind shifts unpredictably, flames eat their way through the forests, driving birds and animals ahead of them.

About a plane where reality seems to shift unpredictably.

Unfortunately, the demand curve may shift unpredictably, making control very difficult.

Monetarists also recognize that the demand for money can shift unpredictably in the short run with changing expectations of prices, interest rates and exchange rates.

The meter shifts unpredictably and often, and so does the mood.

Rocks and boulders shifted unpredictably beneath them as the truck climbed through the narrow gap.

The arrangement of "Cherokee" was equally novel, shifting unpredictably between fast be-bop and a waltz.