One of the hardest senses was touch while you had to close your eyes because you couldn't tell when they were going to drop the ruler at any time. Plus they had to tap your shoulder and right when your partner taps your shoulder they drop the ruler too!
I could use only one of the senses at a time to catch the ruler. The easiest one to do was the sight because, you could open your eyes to see when they point at you and drop the ruler into either your hand or the floor!
My mussels help me to do this experiment by remembering they way on how to do the same reflexes over and over again. It is just like when you are old and you didn't ride a bike for 10-20 years but right once you get back on a bike your mussels remember how to do the same position to ride a bike;