TopGear Caravan Build Challenge

How do they get away with such dangerous builds? 
(I'm sure the local police would not be to impressed.)
Having said that, It is a ridiculously funny video? 

The Top Gear Channel is quite amazing if your into cars, and like light hearted reviews of the different makes they tested.
These guys were a great comedy team of so called experts, and always made entertaining videos, and this one is no exception.

Top Gear YouTube channel: http://www.youtube.com/topgear