The context of the following conversation is Since everyone else turned around when they heard the loud noise, Quinn also turned her head and saw the car crash.:
Quinn says I feel really shaky right now because I saw a car crash earlier..
The friend responds Oh, no! Is everybody okay?.
Quinn responds I don't know. I just heard a loud noise, turned my head and then saw two cars collide with each other..
The friend responds I heard the freeway was blocked off earlier today, so that must be the reason. I hope nobody died..