The word Captain is in the shape of an O and there's also a hint in the word My: Abraham Lincoln's picture. This, of course, refers to the poem written by Walt Whitman in 1865 called "O Captain, my Captain."
Since I heard this three times in two weeks, I thought I should post it. There were eight people who recognized that the color of the letter was as important as the action itself. I do believe I hear this expression more watching American football than I do in reference to the actual historical event itself...
What in the World
Linguistic Illusions to challenge adults and children.