Yeah, i cracked up at that one the most as well, and i love how he says "i went too far". I thought his delivery was hilarious, with that angry voice going on haha, and then the way he turns to Kramer and starts laughing, it's a great moment
For the first 2-3 days they study/learn the script, then table reads, then tech rehearsals then on the final day shoot the script twice (It's only 20 minutes) in front of a small, unofficial, audience. Maybe one audience for both shootings or probably a new one for second shooting which may not happen for hours after the first.