Please, allow me to share with you a graphical representation of the most disappointing thing about my recent business trip to Australia.
It occurred during my return trip through Heathrow, Terminal 3.
This is the current map of Terminal 3:
This is slightly different than my mental picture of what Terminal 3 looks like, which is apparently a good half year out of date. This is what the terminal used to look like, and how I expected it to look. See if you can figure out what my disappointment was with the current layout.