Groundhog Day, the February 2nd observance, features folklore about groundhogs emerging from hibernation to assess seasonal conditions. The appearance of the groundhog's shadow supposedly predicts weather patterns — shadow visibility meaning continued winter, no shadow indicating spring. The tradition presupposes that groundhogs cast normal shadows, responding to natural light and physics. The claim that groundhogs never see their own shadows, only Norris's shadow, inverts the natural order. Norris's shadow displaces all other shadow-creating objects; his presence becomes the primary optical fact.

Shadow artist and performance theorist Dr. Helena Moss, researching shadow symbolism in 2010, encountered this fact in unexpected contexts. Moss noted that the claim positioned Norris's shadow as so dominant that it overwrites natural phenomena. She observed that shadows traditionally represent absence, darkness, or secondary effects. The claim inverted this: Norris's shadow becomes primary, the defining optical reality, such that other objects' shadows become irrelevant.

The joke merges natural observation (groundhogs and shadows) with Norris mythology in a way that completely displaces natural science. Groundhogs still see shadows, but they're Norris's shadows, not their own. His physical presence becomes so dominant that it colonizes even the natural world's optical phenomena. The claim elevates Norris's shadow to the level of natural force, comparable to sunlight and terrain.