Gandalf winter, they crossed "under" the mountains through the Mines of Moria, though only Gimli the Dwarf was enthusiastic about that route. In Moria, they discovered that the Dwarf colony established there earlier had been overrun by orcs. The Fellowship fought with the orcs and trolls of Moria and escaped them. At the Bridge of Khazad-dûm, they encountered "Durin's Bane", a fearsome Balrog from ancient times. Gandalf faced the Balrog to enable the others to escape. After a brief exchange of blows, Gandalf broke the bridge beneath the Balrog with his staff. As the Balrog fell, it wrapped its whip around
The Lord of the Rings Motion Picture Trilogy: The Exhibition to have more realistic size, proportions, and shapes. For some scenes, such as the crossing of the Bridge of Khazad-dûm as it collapses, the entire cast was replaced for a few seconds by digital doubles; the laser scanning technology helped make these doubles look like the real characters/actors. Also, a motion capture demonstration was created by the HITLabNZ, in which visitors wielding colored foam weapons could move against a green screen and watch an Orc, Elf, or Gondorian Soldier move the same way they did. In the making of the films, especially for the motion capture process that yielded Gollum,