What if's and Fate

We all know the 'what if' scenarios. What if this happened? What if that happened? My mother and I today were using the 'what if' concept and applying it to fate. What if our lives really were mapped out for us and we had no escape of our fate? What if when it was your time to go, it meant you really had to go.
What brought on these questions was a terrible accident. A boy that was going to be a senior in my high school this year was swimming in a gravel pit. He dove into the water and hit his head and broke his neck. Everyone who knew him and even those who don't are saying prayers for him and his family. He currently is not showing any brain activity. All we can do is hope for a miracle in the next 24 to 36 hours before they have to call it. One thing that seemed to send a shiver down one's spine, just minutes before he left to go swimming he posted a status on facebook saying "I hate how one day you feel like your on top of the world and one thing goes wrong and you couldn't go any lower..." One thing goes wrong and suddenly you've crossed a line in which there is no return. One thing like a swimming accident, like being sidetracked for a second to keep you from realizing how shallow the water might be, one thing that can have so many results. I cannot possibly imagine what his mother is going through right now. Another girl I knew, she was 3 years older than me, when she was a junior in high school she was in a car accident and was killed. Just before she left her house she left a note on the table for her parents the last part said: I should be back around (a certain time, I don't what what it was), Love you always, Nikki. Should was underlined several times. It just really struck a person, the way it was worded. Why should the word should be underlined? What made it important enough to draw attention to? Why shouldn't she be home at that time? And why on this note did she put "love you always"? However you can analyze words to get any meaning you want out of it. My mother then told me how there was a man down the road, and there was an explosion in his house. He barely made it out and really shouldn't have lived. The next day he was killed in a car accident. He barely survived only to be killed the next day. Why? There was another individual who was standing on a bridge, a car drove by and one of the wheels flew off the vehicle and killed them. It is the only time I have ever heard of an incident like it. It makes one wonder...it's as if it was those individual's time to go.. I'm not saying all of this to depress anyone, I just think that it's something to think about (hypothetically). It's really beautiful to know how people come together to show support whenever someone's in trouble or something goes wrong.