The majority of people do not pass out on these rides (or come close) so those who have a propensity to do so might want to look into whether there is an underlying medical condition.

While "blacking out" (a complete loss of consciousness) is extremely rare, it is possible to experience a "grey out" on the Jurassic World VelociCoaster due to its intense positive G-forces, particularly during the high-speed turns following the second launch. A grey out is a temporary narrowing or loss of peripheral vision caused by blood being pushed away from the head. This most often happens to riders who are dehydrated, have low blood pressure, or are holding their breath. To prevent this, riders are advised to stay hydrated, eat a light meal, and use the "hook maneuver" (briefly tensing leg and abdominal muscles while taking short, sharp breaths) during high-G maneuvers. Despite its intensity, VelociCoaster is lauded for its smoothness, which helps minimize physical strain compared to older, "rattling" wooden coasters.