Ok how come jasper attacks bella when she gets a paper cut in new moon but in twilight when she was in the studio he did nothing.

I think it's because in Twilight he had his family to restrain him if needed, but he was too busy with destroying James to really focus on Bella's blood. Even vamps get overwhelmed.lol.But it is a good point and it could be argued either way I guess.

I was wondering the same thing and figured it was because he expected it at the ballet studio, so he knew to prepare for the scent and he was preoccupied killing James. In New Moon, it was all of a sudden out of nowhere and it caught him off guard.

AHA! A LOOPHOLE! SCORE ONE FOR TWIHATERS! STEPHANIE MEYER ISN'T AS GENIUS AS EVERYONE THINKS! Gawd, I'm sick and going off the deep end. I need mental help.

I think it was because he was to focused on James and his family was there stopping

in the twilight book, they took james out of the room to kill him because of bella's blood. and as for as the movie, he could have always held his breath.