Hi. Your question is incomplete because you didn't show what should be used in the essay. This prevents the essay from being done exactly as you need it. Anyway, I will write an essay below and I hope this helps you and that you can adapt it to the requirements of your question.
The frightening incident I witnessed happened to myself, which makes it that much more terrifying from my point of view.
That moment happened on a completely normal day where I was ready to go to school. I used to take the bus to get to school as it was so far from my house and I couldn't drive at that time.
I was one of the first to get on the bus and while waiting for the other students to get in and occupy the empty seats, I felt a strong impact, which threw me forward violently. I ended up banging my head on the chair across from me and felt violent stabs of pain in my head. I got up still dizzy and realized that the same had happened to all the students who were on the bus.
We were all scared and not quite understanding what was happening when we saw the driver getting out of the bus and heading towards the back of the vehicle, as the impact came from that direction. All the students, including me, got out of the bus and saw that a car had collided with the back of the school bus.
Although no one was seriously injured, the rear of the bus and the car were destroyed. I had a lot of headaches from hitting it in the chair, but I was more scared because it all happened so suddenly and could have had very scary results.
