One evening I was at the lake and I'd just set a series of photos going, when I saw a bright light near the summit of the volcano. I thought for a moment that it was lava, but could soon see that it was skiers descending. The mountain was officially closed so I didn't know who it could be - whether they'd sneaked up there or were volcanologists who'd been to look at the crater, or what. I found out later that it was mountain guides, protesting about the closure of the mountain. They were arguing that it was safe to visit the crater now and that their livelihoods were being ruined. The protest was successful - a few days later, access to the mountain was permitted.