The following is what may have happened off live feeds while we saw fish:
Mike and AG are production people at CBS, both talking over the loud speakers to the house

Mike: Hey Guys, can you all come into the Livingroom please? We need to have a house meeting.

.... ... they speak .... ....

AG: You will be paying for the mic pack Chima, this will come out your Stipend.

Chima: You know what? ***** this *****. I'm outta here. love you, nat--you too Lydia. *throws something* (her mic?)

She presses the diary room button, it doesn't go green, she tries to pull the door open (EVERYONE is in the living room sitting down btw) and Chima says "don't ***** with me, open this damn door. NOW!"

Then Nat and Lydia want to leave with her, but production asks them to remain a moment..

AG: Everyone, PLEASE calm down!

Lydia gets up and tries to open the DR door, bangs on it, crying.

Chima was SCREAMING at AG! The entire control room was told to record everything in case something happened. Security may have been there too.

Result?

1.Chima is the first BB USA contestant to ever QUIT.
2.For the first time ever. No eviction week. (since BB2?)
3.America will be voting as the seventh vote at jury.
4.Chima has forfeited ALL stipend, and will not be at the Finale night.
5.They will be showing this on TV Tuesday. (Probably edited to hell--removing all the good stuff