I'm sorry, but where is 'Top Gear' when jeromy says that a big 4x4 with a great enginge is nonsense? were they manipulated by greenpeace ?
all in all was this episode a bit boring.. give it a 7!
The Flying Part was CGI thats for sure!!!!!!!!!!!!
EDIT: Watched it again and again! It is CGI!!!! The camera perspective out of the car looks like a cheap youtube fake (58:49) and the reflection at 58:51 is rubbish, the physics as well. At 58:58 the size of the car and ship is wrong etc etc.
Believe me, Its cheaper to put a CGI-Man in a dark room, then destroy an Renault. But the main reasons could be that they had no permission from Belfast to make the car sink or it was even to dangerous even for a stuntman.
BUT: It doesn't matter - CGI IS NOT ACCEPTABLE IN THE GREAT REALITY SHOW TOP GEAR!!!!!