The wind was making the curtains billow into the room.

The curtains billowed outward as if in a wind.

The curtain billowed, bursting into a white sail, a curve of light.

The door opened behind him, causing the curtains to billow.

The curtain billowed and opened, revealing an old door behind it.

The curtain billowed slightly; the end of the trough was clearly visible.

Tatty curtains billowed about an open window in the far wall.

Caught by a sudden gust of wind, the curtains billowed.

The curtain between the rooms billowed and the surgeon came through, a man in Girdish blue behind him.

The curtains billowed away from the window, which flung itself open with a clatter.