I vividly recall this one as coming about from the results of some weird conversation with my roommate in college. It was also inspired by Monty Python's semaphore version of Wuthering Heights.
The same roommate and I also had various conversations that culminated in the following phrases.
"We have a sludge planet!" "Dude, it's a sludge planetoid."
"They should have made a Donkey Kong 64." "They did. It was called Donkey Kong 64."
"Valentine's Day is coming up. Do you have a headboat and a skanky loincloth?"
"I was doing well until I hit the Great Wall of China... and a tree."
"They just flew out of the ocean with jetpacks. Something about that bothers me." "Was it a) that they flew out of the ocean, b) that they have jetpacks, or c) that they just flew out of the ocean with jetpacks?"