That reminds me of my favorite (non-astronomy related) scene from Jurassic Park 3:

Dr. Grant: Any questions?

(Everybody in the audience raises their hand.)

Dr. Grant: Any questions not about Jurassic Park?

(Almost everybody puts their hand down.)

If I ever do a lecture and there are a lot of people with questions, I'm going to say "Any questions not about Jurassic Park?" just for the heck of it.

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I want to go back to the moon.
I don't care which rocket you use, whichever one you pick, I'll like it, I swear.
"If you think the LHC will create black holes, you might as well believe Hobbits are at the bottom of your garden."- Dr. Mike Inglis
Rovers forever! - ToSeek