Fragments (2008) on Netflix

Plot summary

Five people survive a gunman's attack at a Los Angeles diner. Carla Davenport, who works at the diner, goes home to her baby and begins to neglect him. Charlie Archenault, a driving instructor and a compulsive gambler, leaves believing his luck has turned. Dr. Bruce Laraby, an emergency room physician, doubts his own judgment and turns to an experimental treatment for his wife's migraines. Anne Hagen and her best friend Jimmy Jasperson hide under a table as the shooting begins. Anne's father is killed, and she finds her classmates eager to hear her account of what happened. Jimmy stops speaking.