Transcript for Double Decker Bus Explosion in London Part of Film Shoot, Scares Locals
And we turn to the scary scene in London, the quiet shattered by this explosion. So chilling because of terror attacks on buses before. But when the dust settled, the word got around, that moment was made in Hollywood. Jennifer Eccleston, reporting in from London. Reporter: An iconic double-decker bus, crossing a bridge, suddenly bursting into flames. Debris flying into the air. Oh, my god! Reporter: The scene, so realistic, so terrifying. Many didn't know what was happening. It was quite a drama. Reporter: Author Sophie Kinsella was at a nearby playground with her kids this morning. It thought it was possibly a major event. Reporter: But the explosion on London's lambetjubridge, St a stunt for action star Jackie CHAN's new film, "The foreigner." Nigel huddlestone catching it on camera. Clearly aware it was staged. The production team sent out this flyer alerting the public, saying, "The explosion is controlled." But not everyone was informed. Bringing back memories of the other time a London bus was targeted, the deadly terror attacks in the summer of 2005. Some finding the similarity insensitive. City officials reassured the public the explosion was just a stunt, but in these times of heightened terror fears, even fiction can hit too close to home. Tom?
This transcript has been automatically generated and may not be 100% accurate.