Company Water Cars builds such watercars that can be used as a car or a boat. The cars are equipped with famous Corvette LS engine. With this engine a watercar can accelerate 0 to 60 mph (0 - 100 km/h) in just 4.5 seconds while driving on the ground. The car costs $200,000.
he would use this
The gibbs lockheed martin terraquad
And yes, it is a concept. but what does that mean to a secret agent?