Maybe he did'nt see your stand or you. Were you wearing your orange? Sounds like a case of he was the first one up to me. I had a similar situation, I was up about thirty feet with a ton of orange on, a guy walked up to me about fiftey yards and put his climber up right in front of me. Right at last light I had a three pointer under my stand sniffen my scent waffers and I hammered him. Then with ten minutes left to hunt the guy gets out of the tree and walks over to my deer,"you gonna come get this" I replied "Yes, hold on a minute", I tagged my deer with him standing right over me. Talk about wierd...