Not narrow gauge but a museum incident just occurring.
A museum in Connecticut has a lot of old equipment and cars covered with tarps. At some point someone piled a number of tie plates on the tarps to hold them down in windy conditions. One recent day, while a number of volunteers were working on nearby track, a strong gust of wind lifted the tarp and the tie plates went flying down all around the men. No one was hurt but it was a very close learning lesson.
What is being placed on tarps at your museum?