At first I thought it was from the end of the original mini, when Joe invades the castle in the mountains to rid Cobra of the MASS device, it's defended by those big snake-headed robots. But nope, those guys were white.
BUT, then I realized, it was from the Weather Dominator mini, third episode, where the Joes fight for a fragment of the machine in some kind of Aztec temple/pyramid. We've all seen it a million times, but it took me a few minutes to put my finger on it.