system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do I get car-sick when I'm a passenger, but never when I'm the driver?
gpt
The sickness is the result of a conflict between your senses (mostly your visual sense and your sense of balance). When you sit in the rear of the car you often don't really know where the car is going and a sudden turn, which your eyes didn't signal you beforehand, makes you feel uncomfortable.