The infamous "selfie stick" -- what is there to say? Any 3 year-old today knows what a selfie-stick is!
However, because Action Cameras are so diverse, just like their users and intended purposes -- selfie sticks (or monopods) have had to be adapted to a larger market than 12 year old girls posting pics on facebook.
There are now foldable, extendable, self-supporting self-stick tripods, floating monopods, and so much more! This market continues to evolve and new products are introduced at the speed of light.