Perry stared at the door that had just closed behind his departing friend.

Robyn did not even notice the door close behind her old friend.

He reached the stairs moments behind his friend and followed him up.

I flew into the hallway and hurried to the side door that just closed behind my friend.

The trail was new, and I figured we weren't far behind our friend.

A moment later, Morath came into the room behind his friend.

But her attention was diverted by something behind her friend.

The navigator came around behind his friend to find out what was on the monitor screen.

The young boy snuck up behind his friend and then hit him with a water balloon.