Two helpless tourists were terrified when a taxi driver locked them in his car and forced them to pay almost £200 for a trip that normally costs less than £50.
The start of their ordeal in Paris is captured in a video posted on YouTube by victim Chakrid Thanhachartyothin, a Thai national travelling with his wife.
Mr Thanhachartyothin had checked the price of a standard taxi from Charles de Gaulle airport to the city centre, and found it was as low as £43.
But the so far unidentified driver, who claimed to be licensed, first said he wanted the Euro equivalent of £216 following a pickup last Thursday morning.
Mr Chanhachartyothin said: "When the taxi arrived at our hotel, the driver picked up a meter and it showed a total of €240 (£209).
"We were shocked, because when we checked online, taxis the city were between 50 and 70 euros maximum.
"I didn’t pay up easily, but the driver was angry and would not let us out.
"We said we would pay, and then go to the police station, but the driver stayed on the phone.
"He was speaking to his gang, and there was a real threat."
The driver constantly shouts: "Pay me, pay me!" during the hour-long journey, claiming that the price was set by his company, and not him.
As a heated argument carries on, he also resorts to shouting "You don’t pay me, no problem" but still refused to allow the couple to get out.
After because increasingly scared and frustrated, Mr Thanhachartyothin handed over €200 (£175) and the couple were allowed out.
They have since made a complaint, and Paris police have opened an investigation for ‘illegal taxiing’.
The driver showed what he claimed to be official documents, but local taxi firms say they know nothing about him.
Mr Chanhachartyothin now hopes that the video will help catch him.
A petition calling for Erewash cabbies to be allowed to have fully-tinted windows in their taxis has been rejected over fears that vehicles could be used to enable the abuse of vulnerable children and adults.