When Ethan asks if he can jump off the roof, the girls say yes, however, if you look at the photo of the apartment building below, there is no flat roof area to climb onto nonetheless jump off of.
When Cat returns from being on the producer's windshield Sam asks where she was but Cat texts Sam on the Nick iOS app that she was on the windshield so Sam should have known where she was.
Sam says she's not a hugger, but she hugged Cat twice in #Pilot.