At first I thought this was going to be about looping a tractor fed printer's paper back into itself to print double sided.<p>This is an interesting way to do present something if you are reading it once and don't need it for reference material. Needing to find a specific page only to have topics interleaved might make searching disorienting.<p>A side note, boxed sets of 78 RPM records used to come like this. At the time, stacking record changers were more common. You would load a stack of records in, play one side of each as they dropped down, remove the entire stack, flip it, and play all of the other sides. 78's didn't hold a lot so this could drastically increase the time between needing to interact with the player.