When Zainab comes to beg Phil for money and ends up insulting him, he then turns the tide by insulting her. When her responds is to smack him one across the face, Phil just blocks her arm and continues to insult her until she is forced to retreat.
Zainab: Masood has Kamil! You've lost, you miserable, pathetic man. And it makes me laugh that now you must kneel in the Mosque and beg Allah for forgiveness! You are a sick, evil, deranged man, I HATE YOU!
Phil vs. Derek on 25/4/2012.
Matthew Rose getting his long awaited revenge against Steve Owen in one of the more intense episodes
The car chase in 2002 with Phil Mitchell and Steve Owen which culminated in Owen's death.
Billy Mitchell carrying the 2012 Olympic flame on 23/7/2012.
Phil and Sharon's rescue of Dennis, Jr. on 14/8/2012.
Lola finally giving Alexa what she deserves on the 5th of October, 2012.
8/10/2012: After Tanya goes to far on criticising Lola's capabilities as a mother, Cora gives her a big "The Reason You Suck" Speech about how ashamed she is of her daughter.
Back in 2000 to 2002 there was "Little Mo" Mitchell who was repeatedly abused by her then-husband Trevor. Any time she stood up to him was brilliant because she was clearly scared out of her mind. The most famous one is when she snapped in the 2001 New Year's Eve episode and smashed him across the face with an iron.
A darker one, but when Carl tries to abuse Ronnie physically (even going on sexually) in the garage and foolishly thinks Ronnie is petrified after all the abuse of her past, she snaps and slams the car door down on Carl's neck when he leans toward it screaming "BASTARD!", killing him outright and ending his spree of terror in the square.