The Elements of Harmony (2) - S1-E2
Other mistake: At the end of the episode when Princess Celestia is talking to Twilight Sparkle you can see that Princess Celestia's tail is on top of her leg instead of in-between. It's covering her cutie mark.
The Elements of Harmony (2) - S1-E2
Continuity mistake: When the ponies encounter the Manticore, it raises its paws and shows its undersides and Fluttershy notices something, even though nothing was there. Then when they stop attacking the Manticore, it shows its paw to Fluttershy to reveal a thorn, but the thorn wasn't there earlier. (00:05:25 - 00:06:20)
The Elements of Harmony (2) - S1-E2
Other mistake: When Celestia is standing over Luna, her cutie mark looks elongated.
Answer: The smoke floats a few feet away from Twilight and close to the camera so you might think that the smoke is right in her face.
Lily Harrison