Flynn is an improv comedian and, as such, ad-libs many of his lines. Although it is often stated that Flynn ad-libs all of his lines, on several parts of the Season One DVD commentaries and special features, both Flynn and series creator Bill Lawrence say that it is generally a mix of ad-libbed lines and the original script, with Flynn usually building on the original lines. Lawrence has also said that the rest of the cast followed Flynn's lead and that he (Lawrence) would occasionally enter the rehearsal room with no idea what scene was taking place due to its lack of resemblance to the original script. Janitor's alter ego, Dr. Ján Ĩtor, is a happy consequence of one such moment of inspiration. Sam Lloyd once commented on Flynn's improvising: "I opened my script up once and it said 'Janitor: Whatever Neil says,' and I just started laughing."