Worst Nightmare
My biggest fear when I am driving on the highway is an eighteen wheeler. I am very aware that my odds aren’t very good if I should have a run in with one of them. I do my best to try to avoid them if it all possible. The possibility of something like this happening is the reason for that fear.
If you are driving a tiny car it is rely hard for the driver of an eighteen wheeler to see you. Not to mention that even if they slam on their brakes it takes a while to stop. That is how you end up with an eighteen wheeler getting up close and personal with one of those huge signs.