At one point, Eddard Stark thinks about Gregor Clegane, including the fact that dogs are afraid to enter his hall. By this point Summer, Grey Wind, and Shaggydog have kicked out all the dogs from Winterfell's hall.
As the story of how Arya disarmed Joffrey is being told by both sides in the Court Renly has to be escorted out because he's laughing at and mocking Joff too much
This exchange between Jorah and Dany in A Game of Thrones:
Dany: Viserys says he could sweep the Seven Kingdoms with ten thousand Dothraki screamers.
Jorah:*snort* Viserys couldn't sweep a stable with ten thousand brooms.
Sansa's proclamation that she wants to marry Joffrey.
A bit of dark humor comes when Dany, after learning that the wine seller who tried to poison her was offered a lordship for assassinating the remaining Targaryens, remarks that Drogo must have earned one for killing Viserys.