Father Purcell Improv
https://www.youtube.com/watch?v=yX8lqkVuU6U
At 1.30 in this video, the actor glances quickly at something off-screen. I get the feeling that he had run out of lines and the producers told him to just continue, which didn't matter given the rambling nature of the character.
It makes me wonder how much of what these type of characters said was scripted and how much was just improvised.
What do ye think?