There's a mysterious curiosity to pneumatic tube systems.

Haven't you ever wondered where it goes when you're queuing in the supermarket and the cashier wraps up bundle of notes into a plastic bullet, sticks it into a tube, presses a button, and... whoosh, it's gone. 

Fortunately, we now live in a world with readily available Go-Pro cameras, mounted to everything and anything, and capturing the hidden and unseen in high definition - and someone has just done that with the undiscovered world of the pneumatic system.

The intersecting tubes might well be considered a relic of a pre-Internet world, designed for pushing and sucking vessels filled with information or goods from one place to another in a time before a click of a mouse did it instantaneously. In Paris, the city once built an entirely subterranean postal delivery service, spitting and swooping letters across the Seine with compressed air.

While email has rendered that obsolete, pneumatic tubes are going through a renaissance, with complex networks still burrowing through hospitals, banks, and supermarkets.

The video below, which captures the journey a canister makes as it flies through the system, was made in the Storting, the Norwegian parliament.

If you happen to be a fluent Norwegian speaker, you can enjoy the pre-amble, otherwise the action starts around 1.10. 

(H/T: Boing Boing)