 that class and I had to do the 20 minute walk back down south. And that was weird because usually I listen to my music while I'm walking. As strange as the silence felt, it turns out it's actually good for me, at least when I'm crossing the street. I'm David Trable. I am Despina Stavrinos. My research broadly is on injury prevention. And one component of that is pedestrian injury prevention. This somewhat new phenomena of people crossing the street while using devices.