Many years ago I was walking through a Canadian forest, heading for an ice climb, not too far from the town of Banff. I was alone, with my companion a few hundred yards behind me. There were a few inches of fresh snow on the ground and the forest was a silent place. I stepped into a clearing and suddenly realised I was no longer alone. A young mountain lion had entered the small sunlit area at the same moment as me. We both froze, uncertain of what was about to happen. The creature paused for a moment, looked at me, decided I was no threat and strolled casually away. The whole encounter only lasted a few seconds, yet it left a profound in impression on me.
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