In late Season 4, Homo Novus spun a cocoon out of Flash comics and mint-in-package action figures, and emerged early Season 5, a boorish, twanging, goofy, redneck, homily-spouting, mean-spirited fool, who subsequently went through a two year spasm of betraying all his principles. As Vintage Sheldon occasionally eyeballs through his current papier-mâché pantomime mask, and manages a brief fling at reassembling his dignity, we ask that you report any sightings of such events to this thread.
To begin with;

And afterwards he vomited on some clowns.

Jim has been nominated! As has TBBT for best ensemble performance in a comedy.