A step or two more and he saw a knife flash.

He started to turn, saw Ricio's knife flash.

Then she saw a knife flash, reflecting the rays of the morning sun.

She saw a knife flash in the air, once, twice again.

I saw the knife flash, a cold gleam as the man swung his arm back to strike at Ward's belly.

She saw the knife flash, heard the awful crunch of fist against bone before the blade clattered to the sidewalk.

There was a knife flash as the killer saw his murderous trick countered.

"X" saw the broad blade of a knife flash in the man's hand.

I saw the knife flash and down he went, yelling in fear and pain.