This is the stuff of nightmares. Let’s face it, when you get into a taxi you have absolutely no idea who the driver is. You have no clue what they did in their past, how good a driver they are, or how they will react if they get pulled over by the police.
If you’re lucky, they will deal with the situation sensibly. If you’re not, they will turn out to be a psycho taxi driver and drive off. With you in the car. And he’ll drive like a madman. With you in the car.
And if you’re spectacularly unlucky, it’ll turn out to be a prank.