Totally Spaced Out / The Switch Glitch - S2-E8
Continuity mistake: When Timmy seals himself in his closet, he boards up the door, but the nails and holes don't match places.
Totally Spaced Out / The Switch Glitch - S2-E8
Continuity mistake: After Timmy encounters Wanda the etch-a-sketch bat (and current godparent of Little Vicky) and before he goes out of the closet, the boards, nails and holes disappear.
Answer: It's a joke. One cannot list all forms of entertainment. The list would never end. The boys were trying to convey how superior they were to the others, by saying that they were too good for comedy.