"RPM's revolutions per minute, inside the engine is something called a crankshaft, the turning moves the pistons up and down. The more rpm's the faster you can go, take this buggy for instance, if we had a second buggy exactly like this one with the same exact horsepower but maxed out at 9,000 rpm with this one maxing out at 11,900 we could see another 15mph out of this one over the other." Finally getting back down to 55 he turns at an intersection out in the country and takes off again getting up to 55 and as he is driving a cop car passes him going the opposite direction. He maintains his speed and just drives out into the country, further he drives the more wooded the area gets.