First as you asked I would like to say thank you but because you asked for it, my thank you seem to become unsincere.

As my true token of appreciation for your writting, I will be leaving you with my sincere comment as below 👇

I like the way your thinking goes. I love the positivity in life. The story of Mr. chang and his son will be a great eyes opener to others on how to see a misfortune diffefently. It goes well with a phrase that I kept in my heart.

If something goes bad now, it meant something better are going to happen later.

My upvote for you worth nothing for now but I hope my comment could lift up the value of your post. Thank you for sharing.

Last but not least, I would like to guess what happen now in your story.
My guess is..
You and your grandpa are standing on the other side of the track with his trolley and your friend is on the other side.
After the train pass by, all of you were looking at each other and burst into laughter of relieve before continuing your ride. I think maybe you and your friend also help your grandpa to deliver the cements.

Well, that was a random guess though. Thanks for the chances of winning.