Even though the only reason you ever use your cellphone is for notifying your parents of where you are, always be careful to answer with "hello". Although unexpected, it may have been the hospital's head of the volunteering department, and the lady who has the final say on if you get accepted or not. Answering the phone immediately with "Mom, I know! I'm right outside the door!" will most certainly result in said department head laughing at you. #LFMF