True or false? Throwing up on the side of the road or in the backseat of the police car is evidence against you in a DUI. Come on. Of course that can be used against you as evidence. Now, they're not going to go collect the vomit and test it for alcohol. The officer's going to say the person was so impaired they threw up in the backseat of my car. It smelled like alcohol. Even if you throw up on the side of the road and there's not really a smell associated with it, throwing up is absolutely an indicator of impairment. So, they're going to argue that you threw up because you were drunk, not because you were scared.