This one's obvious, but you should slow down the scene so you can get a close look at what I'm talking about. Near the end of the movie, when Nemo, Hyde and the Indians walk into the hallway where Dante and the armored soldiers are, and they start shooting with the automatic rifles, watch the scene when Hyde starts to pick up the door to deflect the bullets. It starts at 1:26:10. IF you freeze this frame, you'll notice the door is nowhere in the line of bullet fire, right? And it's intact and untouched when Hyde goes to pick it up. Now advance the frame one second so it's 1:26:11. If you look at the other side of the door, there are bullet nicks! How can there be bullet nicks when Hyde hadn't held the door up yet? From previous takes perhaps?

What's worse is, when Hyde does go to hold the door up, then the door is flawless on both sides. Extraordinary!