At the end of this episode, Matthew thinks he's got his job back and celebrates by jumping on the piano. As he does this, he grabs a cup of liquid on the piano and splashes it down Andrea's blouse as he falls. This seems to be a surprise to Lauren Graham by her reaction. Notice Phil Hartman's smile.
Matthew is a waiter in a French restaurant, trying to speak French in a very awkward manner as if he doesn't know how to speak French. In a season one show, he is on the phone speaking fluent French to a friend (most likely, in France).