(Coulson finds Captain America’s shield prototype…)

Phil Coulson: What’s this doing here?

Tony Stark: That’s it. Bring that to me.

Phil Coulson: You know what this is?

Tony Stark: It’s exactly what I need to make this work. Lift the coil. Go, go. Put your knees into it. There you go. (puts the shield under the coil) And… Drop it. Drop it. Perfectly level.

From the movie Iron Man 2 (2010) | Produced by Marvel