Honestly, the first thing that came to mind was his face... Seeing him in person after only seeing him on screen, I was a bit taken aback because he looked even more handsome than on TV. But it wasn't just his looks; he's been working in the field of stem cells for almost 20 years, so when he started talking, it immediately hit me that he really knows his stuff. Even when I interrupted to ask questions, he didn’t seem bothered at all and addressed all the things I was curious about right away. Every time I thought, "Oh, what's this?" he would already explain that part, so I didn't have anything left to ask. He was very thorough and methodical in his explanations, making it easy to understand, even when I was just sitting there in a daze. It was a day that made me realize why he’s called a stem cell expert. Overall, I was really quite satisfied.