try this boys
grab either one of your sisters hair bands or a rubber band,
put it round your 2 fingers (fold over again if its too loose),
then rip away: the tightness of the band will build up the muscles in your fingers making them faster,
just lob the band round your rist then you can take it anywhere and do it where ever
got it to 18.
but don't be too happy with ur scores because it ain't that accurate, i can only get a real ego to 13