Yo-yo

I used to always have a yo-yo with me. I walked to class in college, and when you're walking 30 minutes two to four times a day, you look for things to keep your mind occupied. Rather than thinking about things like class or what I was going to do with the rest of my life, I thought about the yo-yo, and how difficult it was to make it do what I wanted. I have a doubt that this guy learned all this stuff walking to class and back with a free yo-yo.