Geography, American-style

On the train to work this week, there were three kindly-looking, middle-aged American men standing around blocking the carriage with their luggage, talking about the difference between longitude (east-west) and latitude (north-south).

As I was politely elbowing my way past them, this is what I heard:

"No, no, no. That's latitude. You know how I remember it? Ladder.
Ladder for LADIDYUDE."

Not only did I nearly wet myself with excitement at this little mnemonic that only works if you can do your most nasal American accent ever, I am now sorted for any future pub quizzes with a geography round. Thank you, tourism!