The title "Not What He Seems" is taken from the mysterious and important Twin Peaks phrase, "The owls are not what they seem."
The opening credits of both Twin Peaks and Gravity Falls prominently feature a scenic waterfall in the Pacific Northwest forest.
One brief segment of the opening credits which has been removed in the shorter version used in the second season shows an (animated) time-lapse Image of trees in a row in the forest as the sun moves behind them, shifting their shadows. File:Made me realize bigfoot.png
Time-lapse-style animation, inspired by David Lynch.
When David Lynch had a website over a decade ago, he included a number of short film experiments. Several of these were time lapse images of the shadows shifting in exactly this fashion. Time-lapse techniques have been used by others, much more famously in the film Koyaanisqatsi. David Lynch has no monopoly on this technique; however, given the Gravity Falls' creators awareness of David Lynch's work, I am comfortable deciding that this is the source - but I don't expect anyone else to ever be convinced enough to include the observation in a wiki.
As far as I can tell, these are the only two figures who we see, day in and day out, working in public wearing the same black suit with white shirt - so the Gravity Falls Wiki should acknowledge the inspiration for Stan Pines' dress style.
