For me most of the funniest moments are in "Eclipse" and "Breaking dawan". Even if Jacob is not one of my favourite character, I must says that he's the one who says the most hilarious lines-especially in BD .
chap.3 "You could have called us" Edward said in a steel-hard voice. "Sorry", Jacob answered, his face twisting into a sneer. I don't have any leeches on my speed dial".
Chap.14 "about time", Blondie mumbled from not too far away. "The chainsaw impersonation was getting a little tired".
"He phased in front of Charlie", Edward hissed. ....."He's brave. Brave as you are. Didn't pass out or throw up or anything. I gotta says, I was impressed. You should've seen his face when I started taking my clothes off, though. Priceless", Jacob chortled.
"He wanted to know what I meant by change, and I told him you looked more like Esme now than you looked like Renée"......."after a few minutes, he asked, real quietly, if you turned into an animal, too. And I said, "she wishes she was that cool!"...
look after my heart, I've left it with you