"...I watched it happen! Don't tell me it didn't happen!"
The overuse of the word "happen" in this sequence of dialogue makes me laugh like nothing else.
My 15 year old son made the same comment to me on our 3rd viewing. He even added the line "Don't tell me how many times I happened to say happen" to Nero's rant. He also got a laugh out of Nero's repeated cry of "Spock!!!, Spock!!!" when Spock escaped with the jellyfish.
I also thought the "emotionally compromised" idea being repeated by both Spocks was strange. Even though they were both discussing the regulation about command fitness, the exact duplication of wording seemed awkward.