As a multi-camera sitcom there are numerous continuity issues in most episodes, and here the position of hands and faces is frequently inconsistent when shown on reverse shots.
However, the biggest example occurs around the 13 minute mark, when Freddie is talking to Kara (Stefanie Yunger). Kara is leaning back on a game machine, her arms behind her, before cutting to a front shot with her arms in front of her, folded. (Although her arms are partially obscured on the reverse shot, her body language makes it clear that they are still behind her.)
However, the biggest example occurs around the 13 minute mark, when Freddie is talking to Kara (Stefanie Yunger). Kara is leaning back on a game machine, her arms behind her, before cutting to a front shot with her arms in front of her, folded. (Although her arms are partially obscured on the reverse shot, her body language makes it clear that they are still behind her.)