Imagine this scene on your morning commute to work:

You're sitting near the subway doors and look anxiously at the time. It's currently 8:40 a.m.

You turn on your phone and stare anxiously at the flashing green lights on the map, waiting for your stop to approach.

At 8:51 a.m. the train stops moving.

"Attention passengers, we are experiencing a delay," the voice says before chalking it up to a little more train traffic than normal. The train begins crawling again at 8:53 a.m.

Passengers begin to glance anxiously between the map and their watches and fidget as the time inches closer to 9 a.m.