He halted, like a man who had just bumped against an unseen barrier.

The wind rose, and the waves chopped angrily at unseen barriers.

Jeremiah moved before him, stopped, as if his nose touched an unseen barrier.

The moment his fingertips touched the unseen barrier in front of him, an amazing thing happened.

The admiral and his two guards moved closer to the bed, as though some unseen barrier had been breached.

He stopped dead, almost as if he'd walked into some unseen barrier, his eyes visibly widening.

Only to see it fall short as if it had hit against some unseen barrier.

Only a vague feeling of pressure on the air, like pushing against some unseen barrier, prevented them from walking straight into the chamber.

In time, perhaps half a glass, she fought her way back through the unseen barrier, and stood, panting, outside the black tile line.

He pushed again against the unseen barrier, utilizing his great strength to its utmost.