It's such a JAKE thing, though!
What really irked me (almost as much as the word 'irk') is that Edward says "I leave you alone for 2 minutes, and the wolves descend" But BELLA DOESNT KNOW JAKE IS A WEREWOLF, yet she kind of gives a halfhearted laugh..as if she makes sense of that...

I haven't read New Moon in like a month, but I'm pretty sure she founds out then!
Another comment regarding Jake- (This made me "Lol')
"Does he do everything right? Heck, no! But he's sixteen and he's making it up as he goes along. He's JACOB BLACK!"-Stephenie Meyer, regarding Jake in New Moon
Hahaha.