Her mouth stopped as if it had run into a wall.

He didn't get very far, however, before almost running straight into a wall.

The boy stopped as if he had run into a wall.

"That's a great way to trip over your feet or run into a wall!"

It was as if we had run into a wall.

Those suddenly stopped, as if they had run into a wall.

Then, like running into a wall in the dark, Peter felt a psychic stop.

They ran into a solid wall and had to back off.

The problem here is that they have run into a wall.

Running into a wall of thick black smoke they could do nothing.