Haven't seen an accident in front of me but I have been in a couple of near ones and have seen a lot of aftermaths...

Road accidents are some of the worst because it is almost always entirely preventable and when it goes bad it can really give you a scare.

Haven't been involved in one though so we thank the stars for that.
I do remember one that I escaped with a few minutes.

A petrol tanker that lost control, flipped over, burst and exploded.
Ghastly incident that claimed multiple lives and properties.

Made me somber for almost a week, cause if I came out just a few minutes later, I probably would have been involved...