People that have actually lived through an event like that tend to react slightly differently than those who haven't.
Perhaps it depends on the people. Terrorist bombings in London were not uncommon in the early 1990s and there were also a lot of bomb scares around the same time. I was in Victoria station in February 1991 when a bomb exploded. A strange experience, I had my back to the blast and the force of the shockwave, even some 40 meters away, was remarkable. Anyway, a few months later I got stuck in a bank during my lunch hour because a bomb scare caused the police to close Fleet Street while I was in it. Thing is these types of scares always turned out to be false alarms, they never caught one before the fact, so I was nothing but irritated about the fact that a policeman wouldn't let me leave the bank until the all clear had been called. I would have been quite relaxed to walk back along Fleet Street despite this bomb scare.