When i took CS operating system class few years ago there was discussion on layout of memory and how to retrieve things faster. There was a point where we were asked question on locality and i was first to shoot my hand and prof looked at me : i was eager to answer locality of refrences, i knew temporal locality but i forgot the other one. That is when he told me to remeber Einstein and his space time principal. Instantly i remembered spatial locality. Till this date after so many years i remeber the concept! Woohoo to all the awesome teachers!!