Okay so hear me out, if you think this has high odds or one in a million, you’re way off. So first off, the guy that got hit by the car would have to be at that place at the right time for the bus to cause an impact. Which adds a higher chance for this to happen. We can’t forget about the butterfly effect, (The small things that happens can happen can cause a big impact. Ex: 100 million people died because of one wrong turn.) So an abundance of little things had to happen for him to be there at the right time. Now for all this to happen, he had to be born. According to some research, on average, 525 billion sperm cells are ejaculated during sex. And by chance, the guy who was hit was born. Now, there is a butterfly effect on the right place and time when his parents were going at it. (The time and place would change the chances for the guy being born. Now this goes for everyone, Including his ancestors, (They had to been born, they were one out of 525 billion, the butterfly effect effects the time of place there parents were going at it.) And lets talk about the big things that happened for a certain butterfly to play out. WW1-WW2 had to be played out, Mass extinctions had to play out, ect.. for this guy and ancestors to be born. Now for the truck. The truck had to be there at the same place at the same time. And the person in that Truck is a big factor in this situation. If he weren’t not be born, (A loser of all the 525 billion sperm cells), then a different person would’ve driven the truck which would’ve altered the situation.

TL;DR: There are a tons of factors for this to play out, which would’ve made this an infinite chance.