"Adultery, John." Said by Goody Proctor when Hale asks John to recite the ten commandments. Guess which one John Proctor forgets.
In the movie, the look on Goody Proctor's face when she delivers that line is priceless.
John also lists the commandment to not covet one's neighbor's goods twice.
"I heard she flies!" about Betty Parris repeated by each person who enters her room. At first taken seriously, but by the time Giles Corey says it the entire audience of the theater I was in cracked up.
A spoof called "The Crucible in a nutshell".
"Okay Betty, I want you to tell me in a nice and calming voice who you saw."
"I saw Goody Goody Two Shoes with the devil."
Proctor's deadpan response to Parris saying there could have been poppets hidden in his house
The original script has it as "There might also be two golden candlesticks in my house, but no one has ever seen them." Which isn't quite funny, but serves as a meaningful Call Back to his earlier discussion with Hale about Parris.