Rear-ended

I'm alright, but my car is a bit scratched up. It has got scratches and dents on the bumper, the reverse light is broken/smashed and the exhaust pipes are scratched. It sucks to be involved in an accident. Here is an account of the story.

I was driving along the right lane of the road and the traffic light ahead turns red. The cars in front of me stop. I stop. I hear tires screeching behind me and I look into my rearview mirror. I heard thud, thud, thud and then felt my car pushed forward a bit.
What happened? Four cars down, the car couldn't stop in time maybe he was speeding and didn't notice the cars in front of him were stopping.

Car 1 - pickup truck, that caused the collision.

Car 1 crashed Car 2
Car 2 crashed Car 3
Car 3 crashed Car 4
Car 4 crashed Car 5

Car 5 is my car. The car in front of me was unaffected. We wait for police and get everyone's information. Now, I am sending information to insurance, to report the accident and to get my car fixed up.

Not a good way to start a Monday morning. On the bright side, no one was hurt.