The barrier opened to reveal a stairway to the basement.
A few moments after Cliff's departure, the barrier to the room opened.
The fact that the barrier opened inward was to Cliff's advantage.
When the barrier opened, Marcus saw other figures grouped around a tiny room.
The barrier opens and the customer drives up to a mark.
Donovan played a tune on his computer controls and the barrier opened.
As the barrier opened, Larry edged through, keeping the hand that held the club behind him.
For there was a sharp click in the lock of the door, and the barrier had opened inward.
She unlocked a huge brass door; the barrier opened under the girl's slight pressure.
The barrier opened to let them through, and then closed behind them.