"I think I'm gonna be sick!" Vomits

When someone is nauseous, they sometimes have enough time to warn people of their imminent vomiting — either before they run off to a washroom, or prior to emptying their stomach on the spot. Like its related tropes, Calling Your Attacks, Calling Your Bathroom Breaks and Calling Your Orgasms, it sets up an expectation, then immediately fulfills it.

On other occasions, only the call itself is used. Sometimes this occurs when the creator wants to demonstrate how gross something is. At other times, it can convey the intensity of movements such as head-spinning dizziness, which are enough to induce nausea without vomiting.