In the informational epilogue, atomic fusion is discussed. Mr. McCloud states that water would be used to supply hydrogen, and the waste product would be oxygen; this is entirely incorrect. The waste products of atomic fusion are other elements such as helium.
When Doc Terror was instructing Hacker in aiming the laser from behind the waterfall, he said to move the gun up by five degrees; since the blip on the screen was lower than the crosshairs, he should have said to move the gun down.