Cali is clearly very confused by the reaction, it's evident that she isn't playing a prank of any kind. Mr. Freimann was also confused a bit as the five is left on the counter like that, especially given its worth...

You know Maurice...a lot of the buildings here don't look much like Dogtrot's buildings at all...they're like something from one of those old sci fi films and....holy shit that bird looks so wrong like it's made of bubblegum flying about.

"Dude, can I ask...do you know where you are?" Cali is catching on that Maurice might be having a 'Toto, I don't think we're in Kansas anymore.' moment and her voice is clearly concerned now.