During the scene in Minas Tirith, when Gandalf is standing on the balcony in the dark, the next frame consists of Pippin looking over his new armor, musing, "So, I imagine this is just a ceremonial possession." He is standing up in full clothing in the back of the room. When that scene opens with Gandalf in front, you can see that behind him, Pippin is actually lying in bed! Oops.