![Picture](/uploads/3/9/0/8/39081763/1411665594.png)
In the Mystery Tube I think that there are two strings looped differently inside. The string at the bottom are right next to each other and only when the top strings are both on top. When you pull a string you don't know which string another string will be pulling. The top string both move nest to each other when the bottom string are at the bottom. I think there are two differently looped strings in the tube because the bottom string move next to each other. The top string also move next to each other, and you never know which string it will be pulling.