If you've ever wondered why the intro to 'Saturday Night Live' is as long as it is, this is why.

This behind-the-scenes look at the unseen two-minute set change that went down during the opening credits to transform SNL's set from the cold open to Casey Affleck's monologue stage last Saturday night is truly gobsmacking. How they do it multiple sets week after week is actually astounding, and will make you see SNL in a whole new light.