Article: The accelerator is what controls the engine's RPMs and the speed of the vehicle. If you suddenly release all of the pressure from the pedal, the car will jolt forward and could cause the passengers to lurch forward in their seats. When the engine is in gear, to increase your speed smoothly, continue to apply pressure with your right foot to the accelerator pedal. Continue to press until the RPMs get to the 2500 range on your dashboard display. Don't slam on the accelerator or the vehicle will launch forward and feel uncomfortable to anyone inside of it. Once the RPMs have reached the 2500 range, it's time to change gears. Slowly pull your right foot off of the accelerator so the engine doesn't continue to ramp up RPMs as you place it in neutral gear to transition. If the RPMs are too high when you change gears, the engine will make a rattling sound and the vehicle will shake. Avoid releasing all of the pressure from the accelerator at once or the car will jolt forward and will feel unpleasant to the passengers. After you shift the gear stick into a different gear, gently apply pressure with your right foot while you release pressure with your left foot on the clutch. Finding the balance as the gear takes hold is important to make the vehicle drive smoothly.

What is a summary?
Avoid removing your foot from the accelerator suddenly, if possible. Press on the accelerator gently to smoothly increase the vehicle's speed. Release the accelerator gently when you want to change gears. Apply a small amount of pressure to the accelerator as you release the clutch.