The idea of doing it from a thought of card is great. I have an idea about the method but it doesn't really matter - it was well executed. The only comment I really have is about your presentation. Some of it made sense, some of it didn't. Put your energy into it? I get what you're trying to do - and it's a clever way to set up the desk tap - but it really came out of left field, and your spectator was obviously taken aback by your instruction. And going back towards the start of the video, it seems like you didn't think about what you were going to say, apart from a few words tossed out there for the heck of it - like "mind mysteries" - that don't really make sense, which suggests that you have an idea of what you want to do (and I think there are some nice parts to that), but haven't really followed through with it. Develop the patter. How you speak actually sounds good, but you don't seem to know what you're going to say.