[How does he explain it... Bart grabs one of the lab worksheets and starts drawing on it.] It's like... like MarinaNova. Think of a place where people from multiple dimensions and times can meet without it affecting their worlds. Usually it's its own small dimension, but sometimes it's part of a bigger one. [At this point, his scribbles are a mess, but he's tried to illustrate the nexus the best he can.]
Oh, we won't.
[After speaking to inmates who've been here for a few months, there's one thing Bart's certain about: people leave.] Sometimes - and I don't know why - people somehow get parole and leave.