Today at work I tried out a new routine that consists of a multi-phased card transpo. The method requires a top change to force a card. Usually I consider my top change to be nearly bulletproof but this time I had a coworker in the perfectly wrong spot and I hesitated just a bit as I did it. Needless to say she saw something and she spoke up "I saw that!" she didn't know what she saw but she was sure she saw something fishy. Throughout the remainder of the effect she continued to say things like "I know your secrets Josh, I caught you, just admit it". It was especially annoying when the whole trick came to an end and the climax had nothing to do with a top change and she still was going on about how I "did something". I took her aside afterwords and asked what she saw. She said she saw something when I put the card down. I asked her how that helped the cards change place and she couldn't answer me. But repeated that she figured the trick out. It was clear that she had no idea how it worked and the idea that I had done something sneaky was enough for her to assume that she knew how I did the whole effect. Anyways I left frustrated. She really was a distraction to the actual people I was performing for and she missed the point of the trick completely. This is a scenario that seems to repeat itself every so often and it drives me nuts. What do you think I could have done differently?