Shawn : I understand that you need the four humans to think they're in the Good Place, but using an actual Good Place Janet seems risky. Why don't you have a Bad Place Janet pretend to be good?
Michael : I thought of that, but watch. Uh, Janet?
Bad Janet : [appearing] What up, skid marks?
Michael : Let's try that thing again where you pretend to be a Good Janet, okay? Now, really... really try your best.
Bad Janet : Fine.
Michael : Say, Janet, where can I get some delicious ice cream?
Bad Janet : Oh, there's a wonderful parlor in the middle of town square. My favorite flavor is Rocky Road. It contains chocolate ribbon, marshmallows...
[her head begins to melt and implode in on itself]
Bad Janet : And your dad's salty nuts, you fat dink!
Shawn : I see what you mean. Use the good one.