actually throw up. i have done it, throw up in ur trash can so others see. stick ur finger down ur throat then make a scene in the hallway, for extra proof maybe a little on urself lol, they have to send u home!
hell yeah i have done that a few times....for added effect try to get your eyes all watery from vomiting. it makes you look like hell on earth. nothing wrong with making yourself throw up to get done early