What is the most obscure technological advance ever created?

We have threads for most useful and most harmful, so now lets hear about the most obscure/odd/interesting gadgets and gizmos you’ve come across.

That alarm clock that moves around when it goes off. That was odd but still somewhat usefull.

The alarm bed. Tips you out of the rack at the time you set it to. Creator: John Muir.

Most ever so definitly…I’d have to say those shoes in the 70s that had fish in them. Definitly. I really want one of those.

Does the Segway count? I mean, it’s pretty obscure (outside of FIRST competition venues), and it’s definitely an advance.