How does a person behaving exactly as if their intention is to reach a train and detonate explosives behave that differently from a person with the intention of just catching a train? Running for a train counts as suspicious? Fare-dodging means you're a terrorist?

I don't think you've been seeing the same interview as I have been, Anne. From what I've heard the people weren't scared of the actions of the man who got shot, they were alarmed because of the shooting, and then by the thought that, since thepolice had shot him, he must have been a bomber, and what a narrow escape they had had. And several of them described the police as having been in plain clothes.

For example, from the Times: The shooting had been graphically described by a series of witnesses. One passenger on the train, Mark Whitby, said shortly afterwards: "As the man got on the train I looked at his face. He looked from left to right, but he basically looked like a cornered rabbit, like a cornered fox. He looked absolutely petrified.

"He sort of tripped but they were hotly pursuing him and couldn't have been more than two or three feet behind him at this time. They unloaded five shots into him. I saw it. He's dead, five shots, he's dead."

I see the Evening Standard now says the dead man was "believed to be of South American appearance". Near enough to looking like he might be a Muslim, I suppose.