In the NHL, the refs are watching the timekeeper's box because there's a light that signifies when the commercials are done airing to let them know when to start the face off. You don't see it on TV, of course.All sports do this![]()
When you are in the arena, during a TV commercial break, they play club music, put the camera on people in the audience and do stuff like the kiss-cam. Back in the day, they used to play organ music. Players just standing around on the ice, also waiting for the TV commerical light to go off.