Here is a foldable drone about the size of a smartphone that can be launched by hand. This micro aerial vehicle from Dr. Moble Benedict weighs only 112 grams. When you throw it in the air, its arms unfold and stabilize to achieve hovering state. It is small enough to fit in your pocket. The below video shows it in action:
The propeller arms lock into place, so you can fit this in a bag easily.
[HT]