system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why do we get car sick as a passenger and don't as a driver?
gpt
When you are driving, your body basically identifies the car as a tool you are manipulating. Your actions have direct effects on your motions and what you are seeing, so even though the kind of motion isn't one we evolved for, the brain is ok with it.

When you aren't driving, none of that is true. The brain identifies really fast motion completely divorced from any actions it takes and concludes you have been poisoned. Standard protocol for poisoning is vomit. Because evolution is annoying that way.