Continuity mistake: As Howard and Chuck are in a meeting about their lawyers' premiums going up, Chuck is spinning a pen around in his hand. He stop and lays it down as the woman tells them to not take it personally. The camera cuts to a different angle and suddenly he's got the pen spinning in his fingers once again. (00:10:43)
Continuity mistake: After the meeting and Howard pours a glass of drink for both him and Chuck, he walks to the end of the table and places his hands on a chair as he asks Chuck if he remembers Al McConnell. Chuck has just taken a drink and lowered his arm and glass down to the level of the table. The camera then cuts to Chuck and suddenly he's got his glass up to his face again. (00:12:25)
Answer: It might be the Panavision cap he wore when directing his terrible commercials.