I tried to get it out, but it fell further down. Should I be worried? Can I drive the car as if nothing happened? From the look of it, the space seems to be in the middle of the engine area and the wheel, and there seems to be cover on both sides.
The thing that fell inside was a ring-like object, smaller than palm size, and weighing at most 100g. The bottom line is that I am sure it is overall safe if it just rattles in a confined, secure space.