1. Go on a common Wasteland Server that has vehicle tow enabled. Or try yourself
in the Editor. Don't know where to get the vehicle tow script though.
Example Server Filter: Host: BLS, Mission: Wasteland, Type: Sandbox;
2. Get yourself a car and a Speedboat minigun.
3. Tow the boat to the car while the boat is still in the water.
4. Drive away with the car and you will hear the boat making sounds as it would
drive in the water.