A garage worker wrecked a client's £200,000 (€233,000) Ferrari after he took the supercar for a spin on the road to "put it through its paces" following an MOT.
The Ferrari 612 Scaglietti, which has a top speed of 196mph, was being driven by a road tester from a local MOT centre when it smashed into a lamppost and flew over a two-foot wall into the middle of a roundabout.
The dark blue vehicle, one of only a handful of models in Britain, was seriously damaged after the crash in New Malden, Surrey, in which the driver, in his early 20s, was unhurt.
A source said the car was being given a "quick road test" before being returned to its owner, who is "obviously not happy that their pride and joy has been wrecked".
A Ferrari spokesman said the car was not being driven by a member of staff from Ferrari or an official Ferrari dealership, and added the company would help police with any inquiries.
Police said the incident was being treated as a "one car accident" and that an investigation was unnecessary.
The driver was treated for shock by paramedics at the scene.
Gary Adams, who witnessed the incident, said: "He was driving along one minute and the next the car was in the middle of the roundabout.
"He looked pretty stressed out when he realised the car was wrecked and kept saying his bosses would kill him."
Another eyewitness, who did not want to be named, said: "He just lost control and smashed into a lamppost and then the car mounted the roundabout and ended up in the middle of it.
"There were no other cars involved – he just lost it as he went round the roundabout."