I didn't see a reason for the hand clipping other than the fact that Locke was extremely angry at Jaime and his condescending manner. The fact that there isn't a logical reason doesn't mean that stuff doesn't happen. Tie this up with Jorah's statement to Dany: "There's a beast in every man and it stirs when you put a sword in his hands."
No one has mentioned the humor in the show with the best parts having Tywin call a counsel meeting with a table with chairs on one side. Description from the EW recap: (http://tvrecaps.ew.com/recap/game-of-thrones-walk-of-punishment/
"Here's what happens: All the chairs except Tywin's are lined up along the left side of the table (I wonder if Tywin purposely arranged them that way?). Varys, Littlefinger and Pycelle pause -- they're terrified of Tywin. Littlefinger leaps in front of Varys to get the chair to the master's left. Varys takes the next one. And Pycelle, doing his fragile old man act, is content to have the third (pretending to be agreeable and nonthreatening is how Pycelle has survived all these regimes). Now Cersei's turn. Instead of sitting several seats down from her father, she picks up a chair and carries it around the table and places it at her father's right hand side -- check.
Finally, Tyrion's move. The remaining chair is the farthest from Tywin on the left. This seems to present a problem for Tyrion, both strategically and perhaps even physically given the weight of that chair if he is to retain his dignity.
What happens next is perfect. Tyrion tilts back the empty chair and slowly and obnoxiously drags it across the floor -- sarcastically mocking the jockeying for position that has just transpired -- and then places his chair at the opposing end of the table from Tywin, facing his father as an equal. Tyrion manages to ridicule what the others did while beating them at their own game -- checkmate."
Then you apparently have Poderick wowing whores with mad skillz. Tyrion and Bronn want copious details. Hot Pie making a "dire wolf" bread. Then you have Catelyn's brother, Edmure, getting embarrassed first by his failure to light his dad's funeral boat and then by bragging about taking a Mill against Rob's orders. Tyrion and Bronn's discussion of borrowing money. Talisa telling the young Lannister hostages that Rob does turn into a wolf. Theon almost getting effed into the dirt. Finally, Craster. Worst. Laugh. Ever.
Thought it was a good episode. Some light heartedness with undertones of some very bad stuff to happen.