I was reading Under the Dome and finding it pretty good then something happened and I ended up reading something several pages down the line. Not the ending, something from the middle. Essentially it indicated that one of the characters in the book knew a fictional character, specifically Jack Reacher from Lee Child's series of the same name. It yanked me right out of the book and I couldn't get back into it after that.
"The most dangerous man, to any government, is the man who is able to think things out for himself. Almost inevitably, he comes to the conclusion that the government he lives under is dishonest, insane and intolerable." - H. L. Mencken