It's interesting to see what keeps people occupied while riding the subway. There's usually a good number of people hunched over their cell, often playing some mindless game. Perhaps it's a way to disconnect from their work mode and relax before heading home. That day, around 7PM, I noticed this gentlemen who was very focused on his phone, barely moving. I couldn't tell what he was looking at, but it looked quite serious from the expression on his face. Perhaps some unfinished business at the end of the day. The fact that he was barely moving made it easy for me to sketch him.