Bunnygate always sticks in my mind. It was bizarre switching on live feed that night and having the whole house embroiled in an argument about who called Noirin a "bunny hopping from group to group". And, of course, we had Freddie's epic Shakespearean speech.
"I have NO reason to doubt his honesty! But I have EVERY reason to doubt YOUR honesty!!!". 
Oh, and when Norin walked off as Freddie was talking: "Um, Noirin. Noirin. NOIRIN!! COME BACK HERE!!!! NOIRIN!" *follows her*.