I wouldn't know what to do?!?

We've had some serious tragedy these past few years on this planet. And although I've been affected by them a bit, I'm still pretty removed from it so the affect is minimal.
However, I just found yesterday that two people whom I consider to be some dear friends and fellow brothers in Christ got into a car accident. They were hit from behind and their car flipped over multiple times. Thank God that they're ok but, frankly it's by the grace of God that they are still alive. They both have been released from the hospital with minor injuries and are recovering at home.
Upon reflecting about the events the thought crossed my mind "this could have been a totally different and much more devastating ending." What if they had died? What if they had died? I honestly was scared and just that much more relieved for them because I can't imagine handling the alternative!! I wouldn't know what to do if they had died. I don't know how I could go to work, eat, sleep, laugh, live. I remember how I felt a few months ago when a friend named Caleb died. I felt lost and stuck. I felt the same way about the Virginia Tech event, Columbine, and the death of a 14 year old kid that happened in 2005 around Thanksgiving time.
I guess I've been fortunate enough I haven't had a lot of people that were really close to me die yet. But as scary as it is to think about, I'm all but certain that I will. And honestly.... I HATE.... I absolutely ABHOR that thought!!