The presence of the watching man from the shack had proven an unexpected factor.

He had stepped in as an unexpected factor, to become an immediate target for vicious killers.

It is higher than expected oil, food and other prices that has been the unexpected negative factor in hitting consumer demand.

He was a rogue, an unexpected factor,come for revenge.

It has the air of something improvised in a hurry, to deal with the unexpected factor; that's me.

He had to analyse death as a new and unexpected factor in his life.

Things became unbelievably complex, forever evading us with one more unexpected factor.

The balance-of-payments crisis of 1951 was caused by one foreseen and two unexpected factors.

Another unexpected factor was the performance of the Bengals' special teams on the kicking plays.

"What that means is that in spite of unexpected factors, if the economic recovery continues, they will have a better year."