You're heading home from a long day at the office, driving in rush hour traffic, when someone tries to run a red light - everyone's in a hurry at 5:30 - and hits your car. Your physical injuries are significant, but they'll heal.
Every morning before work, you wake up to log some miles on your road bike. You have been training for the last few months for the annual century ride in the spring. Usually, traffic is not very heavy, so you have become a little too complacent about the risk of cycling every morning.
Imagine that you're on a cross country road trip in your brand new self-driving car. It's hour six with only two hours to go. You've been enjoying the scenery, maybe a book and pleasant conversation with your fellow passengers. Suddenly, a large deer crosses your path and the vehicle's brakes lock. Will you be able to react fast enough?