Car accident infront of my eyes and the bus!

this morning, a car had his E brakes on and he spun out of control. He swerved in and out of the on coming lane. He hit a stop sign and it bent in half and then hit the mailbox. Mr. Kozub, my bus driver approached us with his bus and had a big grin on his face. I thought it was strange to see the mailbox get hit by a white car. It doesnt happen too often and I was very fortunate to see it but at the same time i wasnt because It was not a positive thing to watch.