Station by station, we passengers leave with memories left during our lives. Under prolonged light exposure up to 3 seconds, the nightime 3-dimensional artwork Chair Score by Ming-Hung Yen displayed fascinating inhomogeneity with some interior chairs over-lightened due to the presence of low illumination within the globular structure. The over-lightened chairs looked like the pooled water with reflection of surrounding chairs following the cleaning process at a closed station, after all passengers left. The orange water pipe hung from the chair architecture gave support to the scenario.