I've heard stories

When people are about to commit suicide they regret it after the deed is done

I've heard stories of people who jump from bridges and buildings that once they jump they regret it and die of heart attacks and not the impact itself

I heard a story of a woman drinking poison them immediately calling a taxi to take her to the hospital and screaming at them to hurry

It scares me to think of the fear that they felt the immediate regret they felt