One day last year my roommate and I wanted to go to go out for the evening but she had class, so she had me e-mail her professor and tell him her blood sugar was really bad and she was really sick (she's a diabetic). It seemed to work fine and we were getting ready to go when the Dean of Students called to make sure she was alright and to ask if she needed to go to the hospital or anything. Luckily we were able to keep her out of the hospital while still getting away with our lie.