On an incline, the sliding door can move by itself.
This can cause you or other people to become trapped.
Your vehicle may be equipped with a long sliding door with an intermediate detent. You can also lock the sliding door in place around halfway when opening and closing. If you do this, the door does not have to be opened fully when getting into or out of the vehicle. The sliding door is not fully engaged when in the intermediate detent.
The sliding door opens.