Just a question, we all know from Holliwood that every lift/ elevator ever used in the movie's has a roof hatch that is conveniently accessible to all those "trapped" inside. No special keys or tools, just bang and it opens.

Of all the lifts I've ever taken the only one that had such a hatch was in a mine shaft and it was a wire cage affair that rattled your teeth every inch of the way down to about 600 ft.

So apart from the movies do these hatchs exist and how accessible are they?