Describe the movement
Say whether it falls suddenly, will not stay in its familiar position or catches at one side. Mention any recent furniture-door work.
Keep fingers clear
Do not continue demonstrating a falling door or remove a heavy panel for photographs. Assessment can establish the actual support arrangement and suitable parts before a repair is agreed.
A useful distinction
A furniture panel replacement can change the load on an integrated door's support arrangement. Include that event if known so an assessment considers the fitted panel as well as internal hinge components.