"You Too"

When not to say:

1. When the lady at the ticket counter says "Have a nice flight". (Its embarassing, and has happened to me a lot)
2. When the nurse says "See ya later" as you leave.

When to say:

1. When somebody says "Screw you".
2. When somebody asks "Whats the name of the band Bono plays in?"
3. When you know somebody's gonna say Brutus

I know, I know.. Thank you