I suggest this. The movie was VERY riffable. People have to stay blind to an invisible monster (or monsters; the movie never clarifies) lest they go insane and commit suicide. Also, there are two children: a boy and a girl named (wait for it) "Boy" and "Girl". Plus, it's in Netflix, which means it's very easy to set up a Just-the-jokes for it.
Please Rifftrax, for the love of Sandra Bullock, riff this silly movie!