Capping a day in which South Carolina Gov. Nikki Haley (R) called for the removal of the Confederate flag from the grounds of the state capitol, Lemon held up a Confederate flag of his own and asked viewers, "Does this offend you?"
But it's what he held up next that has everyone talking and tweeting.
(NOTE: The following contains offensive language.)
In a podcast interview that aired on Monday, President Barack Obama used the word "nigger" during a discussion on race. That prompted Lemon to hold up a large sign with the word "NIGGER" on it, and ask his audience, "Does this offend you?"
The unusual segment caused Lemon to trend on Twitter, but probably not in the way he wanted: The trending phrase was "Has Don Lemon Lost His Goddamn Mind?" due to a Gawker story on the segment with the same headline (which includes a poll where readers could answer the question).
Boing Boing joined in, asking Twitter user Darth to get busy with Photoshop and transform Lemon into a meme:
Other Twitter users added images of their own: