160: Hi-perText Markup Lois

Explanation
In the original strip, Thirsty's signs said "I mean it" and "Just kidding". In this strip, the signs have the faux HTML tags for sarcasm on them, in both open and closed forms. Presumably, he'd hold up the open form before he says something sarcastic (and possibly throughout), then put it down and hold up the other one for a couple of seconds after he finishes. Also presumably, he's doing this because his sarcasm isn't coming across in tone of voice.

The author writes:
Original Hi and Lois strip: 1986-12-13.

Transcript
{Hi and Lois are looking out the window.} Lois: Here come the Thurstons... but what's he carrying? {Thirsty is carrying signs with "sarcasm" HTML tags on them.} Hi: Thirsty's been having trouble with his dinner-table conversation!