Gas pedal sticks or your car will not stop accelerating

First check if you accidentally put your foot down on the accelerator by mistake (easy situation to fix). Second, be sure to stay calm! In case your gas pedal sticks, reach down to see if something, like floor mats or any object, might be wedged under there. Put the car into neutral (or press down the clutch), and do not worry about damaging the transmission. This procedure just takes the power from the engine away from the wheels, and lets you use the brakes to stop the car from rolling. In the worst-case scenario, you can even shut off the engine completely (just turn the key to OFF). Your steering and brakes will be harder to use, but they will still work! Coast to the side of the road, and use your emergency brake if you need extra help stopping. You can always practice doing this in parking lots occasionally.