A Colorado woman was hiking a trail when she noticed that a mountain lion had started stalking her. "I turned around and looked, and then [the mountain lion] was just standing there between 10 and 15 feet away from me," Kyra Kopestonsky said. The 40-year-old grabbed a tree branch to make herself appear threatening to the cat, but when that visual tactic didn't work, she went with an audio assault. "I don't know why, I just started singing opera really loud," Koestonsky said. "It kind of put its ears down and just kept looking at me, and it sort of backed away. Then, it came around the bushes and came towards me again and crouched about 10 feet away." The lion would intermittently groom itself and then lunge at Koestonsky, but it eventually wandered away. The Sheriff's Office had been alerted about the situation by Koestonsky's housemate and deputies met her at the trailhead.