Clown

Clowns, by John Sheppard mentioned to Neera as a joke, as an enemy more worse than the wraith. When she didn't get the joke he couldn't make himself say that it was a joke.

Quotes

 * "We fight them too, entire armies spilling out of Volkswagens. We do our best to fight them off, but... they keep sending them in." (ATL: "The Hive")