- Release Date: December 31, 1999
In the year 3000, Kel accidentally makes Roger invisible using a gadget that usually makes garbage vanish.
- Bittersweet Ending: Played for Laughs. Kenan reverses his father's condition but turns Roger into a goat. However, Kenan informs that Roger's doing fine in the petting zoo.
- Death Glare: When Kel asks to be the one to use the Trashinator, Kenan and Sheryl stare down at him to be quiet.Kel: Never mind.
- Exact Words: Kel when Roger turns into a goat.Kel: Well, at least we can see him.
- The Future: The episode.
- Future Imperfect: Justified since a thousand years has passed, Kenan and Kel won't know what most of the past technology is. Because of this, Kel caused the spare reverse valve to be destroyed by a microwave oven. Kenan thinks wall clocks were invented to teach kids how to count to 12, they mistake a skateboard for a back rubber, a flip cell phone for a musical instrument, and are surprised to learn it doesn't have a video screen, as well as seeing a TV without a 3D option.
- Genius Ditz: Kel got a very high grade on his test that even his alien teacher is impressed.
- Get Out!: The owner of the antique store kicks Kenan and Kel out after Kel accidentally destroys the reverse valve in the microwave oven.
- Implied Death Threat: After Kel accidentally destroys the reverse valve on the Trashinator and Kenan says they could fix his problem, Roger retorts, "You better! Or you're gonna wish you were invisible!"
- Lethally Stupid: Kel uses the Trashinator on Roger to stop him from reading the report cards. Fortunately, it just turns living organisms invisible; otherwise, Kel would be responsible in killing him.
- Trigger-Happy: Kel likes using the Trashinator so much that he'll vaporize anything, whether it's garbage or not.
- Unstoppable Rage: Twice by Roger on Kel for causing him to become invisible.
- Wham Line: Kenan informs that A+ is the worst grade. It's A++++ that's the highest mark.
