Wow! What a tumultuous evening!
Ronnie may be HOH, but it's not going to be a pleasant week for him. Or the following week, either. Half the house is kissing his ass to ensure their safety, while the other half is fuming over his vote. They're all comparing notes, and even Chima is seeing the light. Casey is worried that he'll be going up, as it's clear to everybody that he voted against Chima.
Edit: it's impossible to keep up with the action. Ronnie is promising both sides that he's playing with them, and denying that he changed his vote. Casey has them all going through who they voted, and when Ronnie storms off back into the house he concludes that they have their answer. He knows he's screwed. Lydia and Laura just went at it. I think we have our two nominees right there. The most humorous part is when Ronnie told the jocks about his Star Wars collection, and how he and his wife are psychics who are communicating while in the house. She's pleased with his actions!