My second year of OTC Archery hunting in CO at 10K' found me hearing a few bulls bugling in the area, or maybe not. After a day of hearing bugles, sending my own and getting a mixed bag of returns, I was pretty sure I was talking with other hunters. I knew there were a couple folks about 1/2 mile back on the trail and below me. This morning I had planned to listen for any additional bugling and press towards any responses. My first stop was the creek about 200' below my camp. While down there I heard a bugle that sounded about 200 yds away on the other side of the creek. I sent a response and got one back so I started heading that way. About 50yds later I hear another bugle from the same location and I quickly respond. No sooner had I dropped my bugle did I hear the most realistic and mature bull scream I've ever heard. It was short and very easy to understand. It was also about 40yds to my right, on a plateau about 8' above me. I had no cover and no plan, something I already realize was a huge mistake. I was ready to shoot when he finally broke the threshold of that plateau but it was all but impossible for him to miss me, he appeared at 1 O'Clock, 15 yds, and I was trying to be tiny behind a 6" piece of deadfall. From the time he screamed at me until I saw him was about 2 minutes. I never heard a single sound from him until he looked at me and jumped off. My first assumption would be that I need to have a plan anytime I bugle, never know who's sneeking in. Outside of that, I don't know what else I could have done better, other than knowing the difference between a hunter and a real bull....then again, I wouldn't have seen that bull if I wasn't trying to talk. I was at low point before this whole experience and, even though it didn't go as planned, seeing a monster like that up close is going to keep me at this for a long time. I hope others can learn from this experience which I know is not unique, until it happens to you I guess.