I don't have cable, so miss all the MonsterQuest and Discovery references, but on PBS last night they had the Burmese invasion. At one point it purportedly looks as if a scene is unfolding in the wild, where a kingsnake attacks a baby Burmese. The king lets go of the Burmese for seemingly no discernible reason.

However, unless the filmmakers happened to stumble across a mosaic pattern morph of the FLA king, a blotched kingsnake was used for the scene. If so, is that what one would call set up? And if that scene is set up, how many others were/are?