They're insane.
When one of the 830's drives by you loaded everything shakes and for a moment you're praying whether you think God exists or not.
If one is going by fast enough, it can fire a rock the size of a baseball through a pickup truck door. Like the metal part...
They are still awe-inspiring to me and I've been at this job for over a year now. That feeling has not worn off one iota.