As part of some planned filming, a controlled explosion of a bus took place on Lambeth Bridge in central London on Sunday.
The London Fire Brigade in Lambeth, who shared pictures as they stood by to monitor the incident, seemed remarkably chill about the whole affair.
"Just another day on the river..." they tweeted with a video of a massive fiery bus just cruising across the bridge.
Nothing to see here, just a little bit of movie filming.
The film being shot is thought to be The Foreigner starring Jackie Chan and Pierce Brosnan.
People were unsurprisingly a little confused.
But of course, it was all just for a film.
While some advance information about the planned explosion was shared locally...
Bestselling author Sophie Kinsella was among those saying more warning that a production company was going to BLOW UP A MASSIVE BUS IN BROAD DAYLIGHT might not have gone amiss.
Asked whether the public was given due notice of the explosion, a spokesperson for the London Fire Brigade in Lambeth told BuzzFeed News they had no further information on the incident.
A spokesperson for London Fire Brigade's central office said they had not been aware that the filming of the explosion was planned, but believed it had not led to panic locally because they had not received any 999 calls or tweets regarding the incident.
"I'm sure people were told locally. If we'd have known we'd have said," the spokesperson said.
"We're a big organisaion, people tell you those things are going to happen if it crops up."