Visible crew/equipment: When Kel gets up to get more water you can see one of the cameras.

Continuity: Mo Sweater Blues: For the amount of water Kel splashes on Kenan the wet patch is way to big.

Revealing: Cold War: The drill hole Kenan makes at the start are larger than the drill bit.

Factual error: Cold War: When Kenan is making the "cold medicine" he puts it all in the blender. The blender should not leak at all.

Continuity: In the episode when the president comes into Rigby's, near the start Kenan fixes the slush-o machine, but it doesn't work, and slush-o sprays all over Chris. Afterwards, one of the slush cups on the counter falls over. After that, the cup keeps on vanishing then reappearing.