My girlfriend had a car serviced last week. Today we were driving down a dual carriage way and the speed suddenly shot up by 10mph, the car was doing about 6000-7000 revs. She changed down to 1st managed to pull in. She then tried to star the car in neatrual and it was still revving. I suspected a jammed throttle cable put open opening the bonnet I was shocked to see the throttle assembly had came away from the engine. I managed to find a spare nut and put it back so the car is working now but it needs sorting. Just below this are the HT leads which go into the spark plugs so this assembly would have been removed to get access. I find it shocking that a garage cannot do something simple like ensure the nuts to a major component is tight.