What do you need to vomit for? There's a cold breath script out there which, with a little bit of color changing and an increased velocity, would pass as a vomit.
Taosenai, TMR Modular Realism Developer "It is necessary to develop a strategy that utilizes all the physical conditions and elements that are directly at hand. The best strategy relies upon an unlimited set of responses." -- Ueshiba Morihei