ALTA, Wyo. \u2014 A guest at Grand Targhee Resort got "VERY lucky" Wednesday after ducking a boundary rope and nearly falling through a cornice.\r\n\r\nAccording to the resort's social media, a guest ducked a rope line, walked out onto a cornice, and nearly fell through.\r\n\r\n"It appears they fell through a gap that is forming because the cornice is starting to pull away," the resort said on Instagram.\r\n\r\nThe accompanying photo shows a guest-sized hole and lines above it that indicate where the cornice is fracturing. Had the cornice failed, it could have carried the guest down a large and steep cliff.\r\n\r\n\r\n\r\nThe guest was able to self-rescue, but Targhee highlighted the incident as a reminder that cornices are "extremely dangerous and can break unexpectedly."\r\n\r\nA cornice is an overhanging edge of snow on a ridge or crest of a mountain. They are susceptible to failure and can break.\r\n\r\nSigns and resort boundaries exist for a reason! Learn more about cornice danger here.