Well, and the manual is using it simpy wrong,
as it is not framerate independent.
Its just a short code-snipplet to show how the vector
works.

Some small recent games of mine:
Griefer 4k http://damocles11.byethost9.com/griefer4k.html
Kobold 4k http://damocles11.byethost9.com/kobold.html
Cave 4k http://damocles11.byethost9.com/cave4k.html