I have a paragraph of my protagonist driving in snowy weather down a highway to his mom's house. Is this a good place for one or two flashbacks? Context is remembering better days when mom and dad weren't divorced, and a contrasting one with a diagnosis of depression, with drinking resurfacing as a problem too. The whole piece is part of a rewrite around 1000 words, more or less. Should these be really short due to the short story form or be written and integrated well enough?