Origin of Iron Man: Part 2 - S1-E12
Continuity mistake: When Fin Fang Foom and the Mandarin's two mechanical dragons are looking for Tony Stark, they are flying in a clockwise fashion above the crevice opening, and they all change color when reaching a certain position. The silver dragon starts out at around 6 o'clock and then turns into the green color of Fin Fang Foom when it reaches around 9 o'clock. Then Fin Fang Foom turns into the gold dragon when he reaches around 3 o'clock. Lastly, the gold dragon closes the loop by turning silver when it reaches around 6 o'clock. The process repeats itself four more times. (00:12:45)