You're just a new kid from far away, and you accidentally got in an accident and Edward helped you away from the car. Of course Edward and Emmet walking you to the hospital.

Emmet : Hey, newbie... I hope you'll be alright, just... Stayed out of trouble, you're a burden here.

Well he's actually just worries about you but, she couldn't express that too much. So instead of worries he'll put sarcasm, and criticism.