1. The S.H.I.E.L.D research facility in the Avengers movie was actually NASA's Plum Brook Station; the "world's largest space environment simulation chamber", used to test rocket engines and space stations.

2. When they filmed the post credits scene for the premier of The Avengers, Chris Evans had to wear a "prosthetic" face to cover up his facial hair which he required for another movie he was filming at the time. They also had him cover his face with his hands.

3. Tom Hiddleston, who plays Loki, had to learn the most fight sequences of any cast member for his battle with the Avengers. He did training in Wushu, a Chinese martial art, as well as boxing, stick and staff work, knife work and hand-to-hand combat.

4. To prepare for the role of Agent Clint Barton (Hawkeye), Jeremy Renner was trained by Olympic archers.

5. The shocked expression of Loki after being slammed by Hulk was created by animation director, Marc Chu, shaking Tom Hiddleston violently and repeatedly.

6. Robert Downey Junior kept food hidden all over the lab set. In the movie, that's his actual food he's offering (remember the scene with the blueberries?) and when he was eating, it wasn't scripted. He was just hungry.

7. There were 30 Mjolnirs made for Thor: The Dark World. They were made from different materials for different scenes, and had more or less detail depending on whether the shot would be close up or far away.

8. Apparently Tom Hiddleston found the Loki helmet rather uncomfortable, heavy and he couldn't see out of it properly. He has claimed he channeled this discomfort into Loki's battle scenes.

9. There was an entire town constructed in New Mexico for Thor. An entire set town was constructed in Galisteo, New Mexico, to serve as a fictional location for the film.

10. Tom Hiddleston originally auditioned for the role of Thor, and one day the director took Hiddleston out for breakfast and told him he wanted him to play Loki. He was then asked to lose the twenty pounds of muscle he had put on by sticking to a strict diet while training in the Brazilian martial art of Capoeira.