From Homestar Runner Wiki
Occasionally, in the Homestar Runner universe, the characters will find themselves in front of a paper background, typically accompanied by an assortment of crude drawings.
- Every Teen Girl Squad issue appears on notebook paper. Starting with issue 11, the background changes from a computer-created facsimile to an actual photo-image of notebook paper.
- Main Page 9 — Homestar Runner appears as a doodle on a piece of notebook paper. The style of paper changes when you roll over "Toons".
- Email for kids — Strong Bad's potential kids' show takes place in front of yellow lined paper.
- Email virus — The King of Town appears in a Teen Girl Squad-style paper as an effect of the virus.
- Trogday '08 — Most of Strong Bad's tribute to The S is for Sucks Dragon takes place in front of notebook paper.
- Email fan club — Strong Bad's fan fiction is on lined notebook paper.
- Hooked on Decemberween — The Brainkrieg song appears on a paper background, like any other Teen Girl Squad appearance.
- 4 Gregs — Unlike Teen Girl Squad's style of college-ruled notebook paper, this toon takes place in front of hexagonal paper.
- Decomposing Pumpkins — This music video takes place in front of lined paper.