All the events in our lives trigger good and bad emotions, but it is worth considering that the idea of good and bad events only exist in our mind.
An event is only good or bad once we assign to it a positive or negative emotion and furthermore every event can be both good and bad at the same time so it follows that every event is neither good nor bad.
Consider the dog that gets into the pantry and breaks into boxes of food they are not supposed to eat. The owner is frustrated by the mess they have to clean up while the dog sits content with the big feast he just enjoyed.
Our whole life experience is literally a figment of our imagination.
Maybe, maybe not
In this clip from film The Ripple Effect, Forest Whitaker explains this much better than I can.