blink of an eye
flash **
heartbeat *
instant **
jiffy
split second
trice
twinkling
wink
New York minute

He got a hand on it, but only for a split second.

All three of them looked at her for a split second.

It liked to have a body if only for a split second.

At least, that was the way it looked to the doctor for a split second.

He can go from defense to offense in the matter of a split second.

The lights did not go out for him in a split second.

Their dark eyes met and held for no more than a split second.

It was necessary to do a lot of thinking in a split second.

The look came back into her face for a split second.

It was the only thing I could think of in a split second.