I was 17 in boarding school, and my roomate was out late (I think he as at play practice) so I had the room to myself. So I took advantage of my private time and pulled out my dick and started playing. I got really into it, and I was sure I had my privacy, so I took all my clothes off, and was laying half on the floor, half on a big pillow chair. Just as I was ready to cream, a guy who lived across the hall knocked quick and opened my door before I could grab anything to cover up with. He got a good look since I was facing the door, and I could only throw my hands over my dick as I creamed all over myself...with him standing there watching. He asked me a question (which is why he came into my room in the first place) and I gave him a quick short answer as I came. He knew instantly what was happening, and had this stupid smile on his face. Then he left, and in the next few days told everyone he could. Of course they all reported back to me about his claim of catching me, and I deny it to this day (lol). He was a dick anyway.
The strange thing is, that was one of the most intense orgasms Ive ever had. Maybe the adrenaline, the shock, and the orgasm all combined to give me a good one. Ever try to hold on an intelligent conversation while creaming? Its interesting and I was deeply embarassed, but it was so worth it...