Star Wars reference in Liquid Plumber commercial
If you happen to watch closely during a Liquid Plumber (or some similar product) you'll see the THX-1138 reference. This particular commerical shows an FBI raid on a house with the view being from a video camera. There is the standard random symbols and text that they always add to a fake video feed to make it seem like it was really filmed that way but you have to look in the lower right corner.
There you see: X-1138-TH
I know it isn't exactly THX-1138 but it's pretty safe to assume that someone in the production crew knew what they were doing and did a small salute to SW/GL in the only way they could without bringing down the lawyers.
Star Wars can be found in the most amazing places sometimes.