first english blog

today in the first period, I come early and to the classroom....
I meet my English teacher there and help her to move a chair...
then she ask me "how long have you been here?"
then I answer "about 2 weeks"
suddenly she speak loudly "get out of here"
I surprise and look at her,,, for a second I want to reply what!?
then I realize that it was just an expression so instead of saying what I say "why?"

note: get out of here has the same meaning as wow! or something like that... it was one of the custom here,, hahahaha....