I was late because of the traffic.

And figure out how to do this in a way that was truthful in that it imparted what was going on, but not so truthful that the compact crowding in a cell would prevent the vista from happening.

And she does really good business. In fact, I watched her walk through the streets hawking. And before you knew it, there was a crowd of women around her, buying these dresses.

Or we can monitor the velocity with which people are moving with their phones on a highway, and the phone company can see, as the velocity is slowing down, that there's a traffic jam.