They’re just two little words, but when I see them written together at the beginning of a sentence it’s like hitting a pothole: Just then … I don’t know whether it’s just me, but I find that a really lame way to begin a sentence.  Just then X walked into the room,  Just then there was a knock at the door,  Just then I had a thought. The phrase ‘just then’ is kind of redundant when you think about it.  Of course it happened just then, otherwise it wouldn’t have been written there.  What’s wrong with just saying X walked