A bagger is a gigantic machine used to dig up coal. Baggers are essentially diggers and they are used in open-pit mines, among other places in Germany’s lignite mines. Some types of baggers can move 14,000 cubic meters of coal and other materials per hour.

Trivia
A person named Dan DeEntremont has made an animation of a bagger as a Transformer (a toy from the 1980’s which later was turned into movies):