How does Dean Koontz use imagery in The Husband?

Imagery:

"Superstition promised that as long as the street remained still, as long as neither he nor the dog moved, the violence might be undone and time rewound, the bullet recalled to the barrel."

"To Mitch, standing on the back porch, this place, which had previously been an island of peace, now seemed as fraught with tension as the webwork of cables supporting a suspension bridge."