I've done this before, but not quite the variation you described:
1. Grab the nearest book (that is at least 123 pages long).
2. Open to p. 123.
3. Go down to the 5th sentence.
4. Type in the following 3 sentences.
5. Tag five people.
Mine was Water for Elephants, by Sara Gruen. The snippet is:
"What is it?" calls August.
"Did Clive feed the cats?"
His face appears in the crack of the flap.
Not exactly the climax of the book. However, I do appreciate being included. :) I'm not going to tag folks, though, because I'm a mite too swamped at the moment to do the follow-up afterwards.