Continuity mistake: At the beginning when the Stone faces, of the past and present Hokage, are shown from a distance. The two on the right is looking straight ahead and the one on the far left is looking to the left. But when a close up of the heads are shown, the two on the right are looking to the right and the one on the left is looking straight ahead.
Sasuke and Sakura: Friends or Foes? - S1-E3
Continuity mistake: During the scene where Naruto and Sasuke accidentally kiss, Naruto's whiskers are gone.
Answer: That is just a style used by some animators. It is easier to keep the arms in one position than to draw them in motion. And it makes it look funnier.
papajim