* CastTheRunnerUp: Creator/ChristianSlater was the first choice to voice Igor. He wound up voicing Dr. Schadenfreude's Igor.
* DevelopmentHell: The film was in development in 1998 but throughout that time the film struggled to get funding from investors until 2007.
* PlayingAgainstType: Creator/JohnCusack is usually known for playing characters who are have shades of StraightMan or OnlySaneMan. In this film he plays an egotistical Manchild.
* WhatCouldHaveBeen: According to the DVD commentary, Dr. Glickenstein was going to play a bigger role in the movie as there would have been a side-plot of him coming back from the future to stop his past self from accidentally killing himself. The director's said that this was cut out because it would distract from the plot, not to mention how Glickenstein could come back from the future when he died in the past makes no sense whatsoever.
** Also, the joke of Brain melodramatically leaving Igor when the latter tells Brain not to touch Glickenstein's invention wasn't his 'gentle fawn leaving the meadow' analogy, it was Brain saying that he invented a new word for good-bye 'Snarfaug'. There was even a clip of this somewhere online before the movie was released in theaters.
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