the loud bang

Today on the skytrain from Metrotown to Lougheed Mall, I heard a very loud bang from somewhere. Don't know where and didn't ask anybody. I was too mentally occupied by it (and reading the 24hrs newspaper) that I didn't think of looking at the time or approximately where on the track it occured but it was probably around 3:30pm somewhere between Edmonds and 22nd St Station. Or it might actually be before Edmonds.
Anyway, what I wanted to say was this. When I heard the bang, the first thought that came to mind was whether it was a gunshot. And then naturally the immediate thought after was whether I was shot. Do I feel anything unusual? If I got shot in the head, was I going to faint soon? This was from a TVB series I saw probably about ten years ago about some man (played by "Gurng Dai Wai") who got shot in the car and didn't know until he noticed blood coming down his forehead after getting out of the car and then fainted and was in coma for the next however long. He was paralyzed completely and needed help from his wife constantly including toilet and feeding. He eventually passed away. That's all I remember from that series. Anyway after a few moments I went back to reading the paper but occasionally looked up thinking what that bang was.
It just reminded me of two thoughts I had before: 1) we can die so easily..and 2) the end of my life could arrive all of a sudden without any warning. I had thought #2 back in 2000 when my Mom's Volvo got smacked. It came so suddenly and unexpectedly. My seatbelt strap on my chest held me back as my body lurched forward and it felt like somebody took a board and smacked it flat on my chest. I believe that night (or maybe the next night) I couldn't really sleep and chatted with my cousin Kitty (or "May" since she changed her name maybe ten years ago) because it just felt like I could be dead any moment. After the Boxing Day Tsunami hit, I was chatting with Mom about how easy people could die even if they knew how to swim because all it takes is the water pushing you to a pole or you not being able to take just a big gulp of air if the water floods on you so suddenly and that would be it for you. So easy. On July 29, I fell asleep behind the wheel and was awaken by the sound of a smack when my car rear-ended somebody. Again, it felt like everything could all end just like that without warning and at any time. Today's loud bang gave me similar thoughts. I could be in the wrong place at the wrong time so to speak. I just started typing all this out after I felt uncomfortable and decided to say a rosary after my parents have gone to bed and it was approaching midnight. Who knows, and I think it sucks and I certainly don't want it to happen, but my death really could be coming at a very unexpected time and at a time when I still have so much more to do and live. It might all just end suddenly. I'm tempted to question God doing this and I would find it hard to accept, but yeh.
And also, you occasionally hear stories on the news about this young person or that young person getting killed outside a bar or club because they were trying to break up a fight or they just happened to be innocent bystanders who got caught in a hail of bullets during a gang fight. Man this sucks.