My Hood will fall shut from fully open position and I need to change the "Lift Cylinders on both sides. Please check yours for strength! Mine started basically without forewarning just recently and I have order the replacements, but this could be very dangerous for you or someone working in the engine compartment. See the video below. I have had my trunk ones replaced twice now as well.
If you need to order you can do it here ($59.41 each)