[Otter74]

The pickup driver may (or may not - I don't think the video gives enough information to tell) have been driving like a jerk, but he is not responsible for the Saturn driver's crash. She was not allowing enough room between herself and the truck to safely react to surprises, and doesn't appear to have had the skill to do so under the circumstances either. Whether or not the pickup driver was blocking her, if she had been following at a safe distance she would have had the time and space to avoid the mattress.