Tread

Pushed to his breaking point, a master welder in a small town at the foot of the Rocky Mountains quietly fortifies a bulldozer with 30 tons of concrete and steel and seeks to destroy those he believes have wronged him.

Tread is a 2020 crime documentary movie directed by Paul Solet, starring Marvin Heemeyer, Patrick Brower, Casey Farrell. It holds an IMDb rating of 7.2/10 from 3,941 votes and runs 1h 29m.