You will need:
Step 1: Getting You're Paper
Step 2: Mark It!
look at the pic. (sorry my camera wont work and i need 2 use paint)
mark 22 lines about the same length away from each other also next to the 0 make a thumb that fits your thumb size. mark each one as the one that it is like it will be
up to 22
okay u r almost done
make sure that when you mark it it has a 0 like in 0.01 its not 1 tenth of a second its 1 hundreh of a sec
Step 3: How to Play
put your thumb on where you drew a thumb
dont touch the paper have your index finger and thumb surrounding it (see picture)
have somone else holding the top of the paper
they drop the paper without telling you
close with your hand as soon as u can
you see where your fingers are that is your time so if it was on .19 then you got it in 19 tenths of a sec.(190 millseconds)
please tell me if u need help!