Hydraulics is a feature available in some GTA games, when pressing the anolog sticks(Ps2) the car would bounce around in the direction the player wants. Pressing the horn button in a hydraulic car would make it hop. The first car in the series to have hydraulics was a Yardie Lobo, in GTA III. In GTA Vice City, the Voodoo. Finally in GTA San Andreas,the player could customize almost any vehicle and give it hydraulics. In GTA SA most low rider cars already have hydraulics.