Cables that no matter how careful you are at setting up it always ends up a spaghetti junction like behind my TV unit. And also how in the name aunt Matildas' azaleas does a power cord with one end in your hand and the other end in the device or wall outlet start off clear and end up a tangled monster?
It's all explained by string theory, some of the most complicated mathematics ever .
If you ever feel the inclination to read about it...
Spontaneous knotting of an agitated string
It is well known that a jostled string tends to become knotted; yet the factors governing the “spontaneous” formation of various knots are unclear. We performed experiments in which a string was tumbled inside a box and found that complex knots often form within seconds.