In a story time can moves along two axes. The well-known axis run forward and backward. This is horizontal time, which moves story events forward. The lesser known axis runs vertically. When a writer spends vertical time on the story, events stop progressing and the narration is focused on description.This activity will help students develop a sense of vertical time. Students will enhance a bare-bones narrative by adding sensory details and spending vertical time on the narrative. Find this narrative writing task on this page: narrative essay assignments.