The Sad Thing
A near meeting of two parties, one enterting and one exiting a room, resulting in the first party hearing or seeing the other leave without the second party's knowledge. The disappointment that lingers in the heart of the first party usually remains until the two reconnect. This occurrence is also known as the "we just missed each other!" phenomenon.
A: "You know, ust like yesterday, I got up this morning and heard you leaving!"
B: "Aww, it was The Sad Thing again."
B: "Aww, it was The Sad Thing again."