This episode was a good example of what's wrong with the show. And also, what's not wrong with it.
It's the same old thing, some people like the silly bits, some people don't. But what's true, is that if they kept the fakery out of the silly bits, it would be a lot more appealing across the board. For example, the wrapping was fine, but the car keys left on the top was clearly fake and as such was annoying.
A lot of people on here seem to think not finding these things entertaining means that you don't have a sense of humour, but the fact is, people fell in love with TG because it was an entertainment show about cars, that managed to be fun, interesting and different. Now, the challenges aren't challenges, they're skits. What used to make them good, was the real sense that a challenge was afoot. That's now been replaced with a choreographed set-piece.
As others have said, the segment idea was great, but the execution was just daft.