 It's like, oh, that was a great shot. What did you do there? You know enough about billiards and technique to ask him leading questions about specific things. I'm sure you can think of all sorts of questions related to technique that you can ask him about so that he starts self-monitoring and potentially, in theory, is more likely to choke. Again, you might want to tell your friend about this afterwards and buy him a drink. Well, we'll see you at the pool table then. I guarantee victory!