1. There was a loose slope in front of the store, and the surface of the sidewalk was uneven because there were a groove of tiles and a lid of underground facilities such as gas pipes and water pipes. So wheels of wagons and display fixtures were easy to get stuck. She moved the wagon with momentum, without being careful in its place.
2. Reporting was delayed because she gave priority to the work and estimated her leg to heal naturally on her own. Further, since she continued to work, she worsened the condition.