A bus was left roofless when the driver took a wrong turn and crashed into a railway bridge in Kingston.
The roof was completely ripped off but the bridge was not damaged.
Fortunately, there were no passengers on board and no reported injuries when the double-decker crashed near Norbiton station in south-west London.
Twitter user Alex Whitman shared photos of the bus and told the BBC: "I was quite shocked. It's one of those things you don't expect to see."
Mike Weston, TfL's Director of Buses, told the Evening Standard: "The bridge was not damaged and rail services are unaffected. There were no injuries and the incident will be fully investigated."
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