Central London was rocked by a blast when a double-decker bus exploded as it crossed the River Thames.
It wasn't an attack, but rather it was a bit of movie magic, CNN reported.
But some residents and tourists were caught off-guard, claiming the movie studio and the government didn't warn enough people that it was happening.
The blast was all for a new Jackie Chan flick called "The Foreigner."
Others showed the letters that they received giving them a heads up that there was going to be a controlled explosion on Lambeth Bridge.
Either way, Londoners were just hoping the worry and the blast made the cut for the movie.