A loud noise happens on a crowded street. Many people are startled for a moment and then, after recognizing that it was a car backfiring, they go on with their day. But there is a teenaged girl and a forty-year-old man who are having very different experiences. The loud noise initiated a startle response and then the re-experiencing of vivid memories. These two are transported to entirely different places and times that have become defining characteristics of their lives. They are trauma survivors, one of whom is remembering a gunshot and the other the slamming of a door.