Why the Spinosaurus Couldn't Break Through the Doors - Jurassic Park 3

How come the Spinosaurus was able to smash through a massive metal fence, but it couldn't break through a couple of little doors? Here, I discuss the possibilities as to why it couldn't do it. This video is merely speculation; not an official, "set-in-stone" explanation. This is just like what I did for my video, "How Rexy Got into the Visitors Center". I hope you like the new intro! Enjoy!