IF YOU ARE A GUIDE, AND YOU see a tiny landslide in progress, you might think, “No big deal. I can still help my guests across the landslide.” But as this video shows, it might be a good idea to try and resist that impulse. The video, which takes place at Aconcagua Provincial Park, shows guides helping their guests across the landslide, only to dive out of the way as an even more massive landslide barrels down the side of the mountain.