Is that what its called?
i asked my uncle the other day to say something odd, he then said something simular to this and then i found it on the internet :-P
PARADOX!? WOULD YOU TELL ME A BEDTIME... DAD I CANT SLEEP; TO GO ANYWHERE, YOU MUST GO HALFWAY FIRST, AND THEN YOU MUST GO HALF OF THE REMAINING DISTANCE, AND HALF OF THE REMAINING DISTANCE, AND SO FORTH TO INFINITY: THUS, MOTION IS IMPOSSIBLE.