During this scene, Tituba lead the girls to dancing naked and committing witch-like crafts in the forest. Also, Abigail drunk blood to try to kill Elizabeth Proctor to be with John Proctor. During all this, the girls didn't know they were secretively being watched by Parris.
During this scene, Hale asked Proctor to say his ten commandments to prove he was a man of God. As he was reciting them, Proctor forgot the one about adultery. This was ironic because John was having sex with a girl out of wedlock.
...Thou shalt not bear false witness. Thou shalt not make unto thee any graven image.
You have said that twice sir.
Recite your 10 commandments!!
You forgot adultery, John.
During this scene, Mary Warren is giving an Elizabeth a poppet that she made. Not knowing, the poppet contain a needle put in by Abigail that would soon get Elizabeth in big trouble.