Avalanche

After I explained what had happened, amd how I felt terrible for setting him off, she was silent for a moment, and then gestured out of the window to the mountain in the distance.

"Remember a few seasons ago when there was that avalanche? Thousands of pounds of snow and rocks swept down the mountain and damaged so much. That was probably set off by a traveller stepping poorly.

So what caused it?"

"The traveller, obviously."

"No, it was caused by all that put the stones and rocks there, and didn't bother securing them. Never forget what set things up."