It was an uneventful trip in the car, but that guy who cut you off and forced you to stomp on the brakes stays with you.
There's a reason: the human brain's "negativity bias." It keeps us from getting into danger, but certainly has its drawbacks.
Neuropsychologist Rick Hanson says it can be avoided; he shows how in his book Hardwiring Happiness.
This is a replay of an interview from a while back.