A diligent air ambulance pilot bought a parking ticket for his helicopter while attending reports of a stabbing in Norwich.
Emergency services were called to Dereham Road, just outside the city centre, at 6.10pm after a man in his late teens was injured.
A crew from the East Anglian Air Ambulance flew in and landed in the Norwich City Council car park at the corner of Grapes Hill and Dereham Road.
Keen to "pay his way", the Anglia 2 pilot, Gavin Blake, who is based in Cambridge, made sure he stayed on the right side of any parking attendants while he was there - and bought a ticket.
The conscientious move was captured on camera by local councillor James Wright.
The injured teenager, who was stabbed close to the Co-op store on Dereham Road, was taken to hospital with a leg and back injury.
The air ambulance was not required and he was taken to the Norfolk and Norwich University Hospital in a non-life threatening condition by paramedics. He remains there in a stable condition.