Remember when we used to stack domino tiles. We would use dominoes and stand them on end in long lines so that when the first tile is toppled, it topples the second, which topples the third, etc., resulting in all of the tiles falling. For large and elaborate arrangements, special blockages are employed at regular distances to prevent a premature toppling from undoing more than a section of the dominoes while still being able to be removed without damage. Would that have helped here?