system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why do I only get car sick when I'm a passenger and never when I'm a driver?
gpt
The same reason why you can't tickle yourself, your body is able anticipate the movements because your brain is the one making the decisions, which delays/prevents the onset of motion sickness. With passengers there is a disconnect between what you are seeing and what your body is feeling (all to do with the balance mechanisms of your inner ear), this fools the brain into thinking you are hullucinating which in turn makes it think it is being poisoned. At this stage you get the nausea as your body wants to expel this imaginary poison by vomiting it out.