Laurie: You were back on the happiness lab a bit ago before. And i wonder if you'd quickly share that story again for me. I think it'll help listeners really understand how you got interested in the kind of like studying behavior change and how it's really affected you personally. Laurie: Yes, deafnly had a very formative experience with change. When i was six years old, i started playing the violin,. It very quickly became my goal to become a professional violinist. Then when i was 15, i experienced a sudden hand injury that fully derailed my career and basically ended it overnight.