For the spoilerphobic, T-Rex is convinced that it's "horses all the way down" for English words and idioms. Lots are, but the joke is the implied overgeneralization. This thread is basically "troll physics" and related humor for linguistics .
I was recently in a class discussion about ergative/absolutive languages. I asserted English is clearly ergative. My proof?
"Who thinks English is ergative? Me." The professor laughed and gave me an Altoid for my courage.