Then, impelled by some force, the white, frosted barrier swung outward.

It was not until the huge barrier had swung into position that Hawkeye lowered his gun.

Of its own accord, the barrier swung inward before she could shift her weight to stop it.

Not a sound was made as the barrier swung open and closed behind him.

It whirled toward the door, just as the barrier swung inward.

That barrier swung inward; others with guns poured into sight.

The barrier swung open; the man jumped aboard the touring car as it passed.

The barrier swung outward; a flood of fresh air entered.

Wheeling, The Shadow was just in time to see the barrier swing open.

He was rewarded finally by seeing the hinged barrier swing open.