 At one point in the film, Frodo runs along a corridor in Bag End, followed by Gandalf (played by Ian McKellen).Wood and McKellen were filmed in separate versions of the same corridor, built at two different scales; these two separate shots were then combined to create a shot of both actors appearing to be in the same corridor.Forced perspective was also employed, so that it would look as though the short hobbits were interacting with taller Men and Elves.