I'd like to see you do a 'Gag Factor' scene. It's essential that you let your head hang UPSIDEDOWN in the scene and just let whatever happens to happen. If you throw up, incorporate it into the action, if the phlegm,etc. runs into your nose and eyes and hair, don't try to wipe it away. All you have to do is hang your head UPSIDEDOWN and try to catch your breath when absolutely necessary. Doing a 'Gag Factor' is a pre-requisite for porn superstardom. At least that's what Jeff Steward always says.