To drive past an accident without so much as slowing down feels very callous

It also causes more accidents when the car behind DOESN'T slow down - again, I've dealt with this type of incident when doing motor claims. When driving what can be a deadly weapon the idea is to concentrate on your part of the road and ensure that you are not causing inconvenience or danger to other road users.

Try slowing down to look at an accident during your driving test. I guarantee that will get you failed!