Iron Forged in Fire: Part One - S1-E1
Continuity mistake: Tony walks by some people in the Stark Lounge, and from a high angle their shadows are seen. The shadows are very close to the people’s feet, showing the light source is almost totally overhead. A couple shots later, you see behind Tony as he is walking, the same people in almost the same spot, with their shadows extended out further, as if the light source has moved several feet in front of them, but while they are still inside the building. (00:02:00)