Sometimes headphones are good to block out stuff. Other times they make you unaware of the dangers around. As you focus your attention on listening to the music or the voices of your teammates, just be sure you are also looking around yourself.
It happens. Real news a guy in subway got shot and noone saw it happen. They all were on their cell phones. The shooter wanted to prove something about this situation but it's sad that life was lost. This art and your desc made me think of that news. I agree.. We all are so unaware of dangers now lately. D: