Visible crew/equipment: In the beginning of the show right before Percy enters Blackadder's room you can see the shadow of some equipment moving up and down above the fire place. (00:00:35)
Visible crew/equipment: When Blackadder and Melchett leave to go visit the Queen and they close the door, the boom mike is visible in the upper left corner of the screen. (00:05:05)
Visible crew/equipment: When Blackadder is about to leave Captain Redbeard and Redbeard says, "So you do have some spunk in you," you can see the boom mike pop into picture in the upper right corner of the screen. (00:12:50)
Answer: According to the IMDB.com's quote page for Blackadder The Third, it's "Aahhhhh. Hot potato, orchestra stalls, Puck will make amends. Owwwwww."
Gary O'Reilly