Three novice hikers in Shasta Mountain, California, USA, planned their hike with the help of AI, but an accident occurred due to insufficient preparation. They used Google's AI model 'Gemini' to determine the hiking course and necessary supplies, but they actually lacked food and water. The AI-based hiking app also became unusable due to cell phone battery discharge, and they lost their way in Mud Creek Canyon, deviating from the official trail. Eventually, one person suffered a knee injury and waited for rescue without warm clothes or emergency rations. This incident has led experts to warn against relying solely on AI for travel planning and against depending solely on mobile phones or GPS devices.