Console question

["Tran Tuan Anh" <trantuan@comp.nus.edu.sg>]

HI all:

Just a concept question.
When I startx from the first console F1,
now can can switch to other console by Ctr+Alt+Fn

But what if I switch to F1 again? What will happen?
I seems to be that I never can get back the window system again..

Cheers!
Tuan Anh