Unrelated note: For some reason, I mis-read the slashdot headline as "What To Do When the Raptors Come?" what do you do when the raptors come?
meteors worked last time...
You should probably read the section before that. At the beginning of the chapter, Jesus said in reference to the temple that not one stone would be left on another. The disciples then asked him when these things would happen, and he proceeded into a rather lengthy explanation with one "rabbit trail" into the end times to address/correct the idea that Jews thought the end of the world would come when the temple was destroyed. He then wrapped it up by answering their initial question of when the prophecy about the temple would come to pass. The structure of the passage makes a lot of sense when you think of the flow of a conversation. People tend to not really look at the surrounding text when talking about this verse and instead take it out of the context of the conversation, a dangerous practice albeit a common one on both sides.
FYI, destruction of the temple was around 70 A.D. Within the timing of the current generation prophecy.
"It may be that our role on this planet is not to worship God but to create him." -Arthur C. Clarke