>>BTW, "fall asleep" is another funny expression -- no English word for "zaspati" (start sleeping).
>
>Do you never get that falling sensation when sleep's on its way?

Sort of, but "fall" doesn't describe it well, because it implies pancaking on the pavement at the end of it. The Serbian "sink into sleep/dream" (same word - that's where we are one word short) feels like a more accurate description.