system
Given the following post, respond as if you're commenting on Reddit:
human
[The Good Place] How did she get back? (SPOILERS Season 4)

After being rescued, Good Janet destroyed the portal between the Bad Place and the Nuetral/Test neighborhood. So how was Bad Janet supposed to get back to the Bad Place when she was released if the only way is by train?
gpt
The train is not *quite* the only way(due to the nature of Janets, and the fact of the Experiment), and that particular tunnel is not the only train tunnel, it was just the one that would have provided the best way for the Demons to pursue them. Janet straight up says that it will "slow them down", not stop them entirely. 

And besides, between their escape and the release of Bad Janet, **six months** of in-neighborhood time passed.