You can try to sort things out before he does, or let your mind fall into step with him.

He changed the subject as the two men fell into step with her.

She hadn't gone far before another man fell into step with her.

His friends fell into step on either side of him.

Instead he fell into step, and they went on from there.

She caught on fast and fell into step behind him.

She began walking; the men fell into step on either side of her.

Then she pointed toward the east, and the rest of the group fell into step behind her.

As we fall into step together, I tell her she has me a bit confused.

He turned away, but I followed, falling into step with him.