Have your friend hold a yard stick from the top so that it is up and down with the bottom several feet above the floor. Your friend may have to stand on a chair to do this. You hold your fingers opposite the 18-inch mark, but don't touch the stick! Without warning your friend should let go of the yard stick, and you should try to catch it with your fingers. Notice what inch mark your fingers are on when you catch the stick. Subtract this number from 18 or subtract 18 from the number to see how many inches the stick fell before you caught it. Try it several times to see if you get the same answer. Let your friend try to catch it while you drop it. Who has the quickest reaction time? distance dropped reaction time 2 inches = 0.10 seconds 4 inches = 0.14 seconds 6 inches = 0.18 seconds 8 inches = 0.20 seconds 10 inches = 0.23 seconds 12 inches = 0.25 seconds 14 inches = 0.27 seconds 16 inches = 0.29 seconds 18 inches = 0.31 seconds http://scifun.chem.wisc.edu/WOP/Reaction.html I did this one. The first time was .25, the next one was .14 and the last one was about .19 I guess. Quite fun and challenging. I must practice grasshopper! My goal is ti get it down to .10 or LESS!!!!! How did everyone else do?