Sorting the good WTF from the bad WTF

At the YA Buzz Panel at BEA, the editors up on stage were pimping their books of choice. Aside from indicating what created buzz (emotional impact, suspense and heat), they went into books that made them go, WTF? And then there was some branching into the books that had good WTF? moments that had them reading on and bad WTF? moments that had them saying no thanks.

For me, good WTF? -

A 12-year-old getting picked for a game to play to the death . . .

Bad WTF? -

Edward giving new meaning to the term, "eating out" . . .

The difference between good WTF? moments and bad WTF? moments are your reaction and whether it makes you want to read on or potentially hurl in the corner of your room. The good WTF? moment the panel gave was for The Maze Runner. The story starts with a character in a black box that's lifting like an elevator and opens in a maze. That will probably have you going WTF? but, chances are, you're going to want to keep reading to find out WTF is going on, right?

The panel didn't actually give specific examples of bad WTF? but let's keep with the Twilight theme here since Breaking Dawn had so many of those moments.

So, bad WTF? moments that might have you running away screaming? Bella's spine breaking. WTF? Edward eating the hellspawn right out of Bella's uterus. WTF? Jacob "The Pedophile" Black falling in love with the newborn hellspawn. WTF? The mean, badass vampires ending the pay-per-view fight of the century by talking things out. WTF? If you're not reaching for some kind of incendiary device by now, you have a stronger will than I do.

So what books had good WTF? and bad WTF? moments for you? And do you agree with Arthur Levine that the three elements of buzz are emotional impact, suspense and heat? What other elements of a book could generate the same kind of buzz?